Oracle Forms

Hello friends

i am using Oracle 10g XE with Forms 6i on WIN 7 ...
For the past more than a year my application was running quite smootlhly, now i am facing an issue with the listener connection.
my clients are not communicatin for the reason unknown to me. i have checked the node addresses and my application folder sharing is OK.
i even tried changing the Names by giving IP addresses...

kindly help me by taking some time going thru my config files and somebody please suggest me...

C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\log

LISTENER.LOG
============
TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Production on 13-FEB-2012 16:23:16

Copyright (c) 1991, 2005, Oracle. All rights reserved.

System parameter file is C:\oraclexe\app\oracle\product\10.2.0\server\network\admin\listener.ora
Log messages written to C:\oraclexe\app\oracle\product\10.2.0\server\network\log\listener.log
Trace information written to C:\oraclexe\app\oracle\product\10.2.0\server\network\trace\listener.trc
Trace level is currently 0

Started with pid=2832
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=Rehan-PC.dcs.local)(PORT=1521)))
Listener completed notification to CRS on start

TIMESTAMP * CONNECT DATA [* PROTOCOL INFO] * EVENT [* SID] * RETURN CODE
13-FEB-2012 16:23:22 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=)(USER=ADMINISTRATOR))(COMMAND=status)(ARGUMENTS=64)

(SERVICE=LISTENER)(VERSION=169869568)) * status * 0
No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
No longer listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=Rehan-PC.dcs.local)(PORT=1521)))
Listener completed notification to CRS on stop
13-FEB-2012 16:23:22 * (CONNECT_DATA=(CID=(PROGRAM=)(HOST=)(USER=ADMINISTRATOR))(COMMAND=stop)(ARGUMENTS=64)(SERVICE=LISTENER)

(VERSION=169869568)) * stop * 0

SQLNET.LOG
==========


***********************************************************************
Fatal NI connect error 12170.

VERSION INFORMATION:
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
Oracle Bequeath NT Protocol Adapter for 32-bit Windows: Version 10.2.0.1.0 - Production
Windows NT TCP/IP NT Protocol Adapter for 32-bit Windows: Version 10.2.0.1.0 - Production
Time: 21-MAR-2012 15:35:52
Tracing not turned on.
Tns error struct:
ns main err code: 12535
TNS-12535: TNS:operation timed out
ns secondary err code: 12606
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
Client address: (ADDRESS=(PROTOCOL=tcp)(HOST=192.168.1.51)(PORT=52220))

C:\oraclexe\app\oracle\product\10.2.0\server\NETWORK\ADMIN

LISTENER.ORA
============
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
)
)

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = Rehan-PC.dcs.local)(PORT = 1521))
)
)

DEFAULT_SERVICE_LISTENER = (XE)

SQLNET.ORA
==========
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.

SQLNET.AUTHENTICATION_SERVICES = (NTS)

TNSNAMES.ORA
=============
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = Rehan-PC.dcs.local)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)

EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
)
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
)
)

ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
)
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
)
)

C:\orant\NET80\ADMIN
TNSNAMES.ORA
============
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = Rehan-PC.dcs.local)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)
Beq-local.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = beq.world)
(PROTOCOL = BEQ)
(PROGRAM = oracle73)
(ARGV0 = oracle73ORCL)
(ARGS = '(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))')
)
)
(CONNECT_DATA = (SID = ORCL)
)
)
Tcp-loopback.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = tcp.world)
(PROTOCOL = TCP)
(Host = 127.0.0.1)
(Port = 1521)
)
)
(CONNECT_DATA = (SID = ORCL)
)
)
Example1.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = tcp.world)
(PROTOCOL = TCP)
(Host = Production1)
(Port = 1521)
)
)
(CONNECT_DATA = (SID = SID1)
)
)
Example2.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = spx.world)
(PROTOCOL = SPX)
(Service = Server_lsnr)
)
)
(CONNECT_DATA = (SID = ORCL)
)
)
Example3.world =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS =
(COMMUNITY = nmp.world)
(PROTOCOL = NMP)
(Server = FinanceServer1)
(Pipe = ORAPIPE)
)
)
(CONNECT_DATA = (SID = ORCL)
)
)
Rep60_REHAN-PC,Rep60_Rehan-PC.world=(ADDRESS=(PROTOCOL=tcp)(HOST=Rehan-PC.dcs.local)(PORT=1949))


Ping of client, my own PC and LISTENER STATUS @ command prompt
===================================================
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

DB Owner PC
===========
C:\Users\rehan.DCS>ping 192.168.1.5

Pinging 192.168.1.5 with 32 bytes of data:
Reply from 192.168.1.5: bytes=32 time<1ms TTL=128
Reply from 192.168.1.5: bytes=32 time<1ms TTL=128
Reply from 192.168.1.5: bytes=32 time<1ms TTL=128
Reply from 192.168.1.5: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.1.5:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

client PC
=========
C:\Users\rehan.DCS>ping 192.168.1.51

Pinging 192.168.1.51 with 32 bytes of data:
Reply from 192.168.1.51: bytes=32 time<1ms TTL=128
Reply from 192.168.1.51: bytes=32 time<1ms TTL=128
Reply from 192.168.1.51: bytes=32 time<1ms TTL=128
Reply from 192.168.1.51: bytes=32 time<1ms TTL=128

Ping statistics for 192.168.1.51:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

C:\Users\rehan.DCS>lsnrctl status

LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 02-APR-2013 08:36
:26

Copyright (c) 1991, 2005, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Produ
ction
Start Date 31-MAR-2013 16:38:01
Uptime 1 days 15 hr. 58 min. 25 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File C:\oraclexe\app\oracle\product\10.2.0\server\network\a
dmin\listener.ora
Listener Log File C:\oraclexe\app\oracle\product\10.2.0\server\network\l
og\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=Rehan-PC.dcs.local)(PORT=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=8080))(Presentation=
HTTP)(Session=RAW))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "XEXDB" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "XE_XPT" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "xe" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
The command completed successfully

C:\Users\rehan.DCS>

Windows COmponent SERvices
==========================
please refer to the attached i