Oracle Database Discussions

Hi,
Actually i want to select customers from the table whose lastacssts should be greater than the time i will be getting from Date object in JAVA.
What i am doing is getting that value from JAVA date which returns the date object in following format

Thu May 26 18:07:57 GMT+05:30 2011


but when i want to execute the above query in ORACLE i am not getting the abbrevation CODE .Given below is the Oracle query i am executing

SELECT distinct cust.custid FROM Customer cust WHERE
cust.custid! = '123' AND (cust.lastacssts AND
TO_TIMESTAMP_TZ('Tue May 24 20:11:20 GMT+05:30 2011', ' DY MON DD HH24:MI:SS TZDTZH:TZM YYYY'))

The Datatype of lastacssts is Date in ORACLE


I Get Following Error

ORA-01857: not a valid time zone
01857. 00000 - "not a valid time zone"
*Cause:
*Action:

So anyone has any idea about how can i represent GMT in oracle Query because when i remove GMT from the query and just place +05:30 it runs fine but from JAVA
I am getting GMT+05:30 and i cant separate GMT from +05:30.I searched on internet but did not find any solution for that.

Any Help Regarding this would be appreciated.

Thanks in advance