Java Database Connectivity (JDBC)

I am facing a problem on my server which connecting my application to the database. My application works fine for some time even the following error occurs as per the log but after some time my application doesnt work when there is a connection to database. can u help me out to figure out this.

The configuration of my server is:

MS SQL Server version: 7.00.623
NT Version: 4.0 SP 6
Memory: 1.5GB
CPU: 4 x 700Mhz
Server: Compaq

JDBC Vendor : JTurbo (we can get the full information about it from www.jturbo.com)
JTurbo Version : 1.3

JRE : Sun java ver 1.3.1_01

Web Server : Microsoft IIS
Version 4.0 (Build 1381: Service Pack 6)
Microsoft Management Console 1.1


and the errors are:
Error 1 :
---------
java.sql.SQLException: java.io.IOException: Stream closed.
at com.ashna.jturbo.driver.v.a(v.java)
at com.ashna.jturbo.driver.v.execute(v.java)
at com.ashna.jturbo.driver.c.commit(c.java)
at com.citibank.EnvDetection.db.DBManager.storeUserInfo(DBManager.java:397)
at jsp.install.gettingstarted.validateuserinfo._jspService(validateuserinfo.java:85)
at com.livesoftware.jsp.HttpJSPServlet.service(HttpJSPServlet.java:31)
at com.livesoftware.jsp.JSPServlet.service(JSPServlet.java:129)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:840)
at com.livesoftware.jrun.JRun.runServlet(JRun.java:321)
at com.livesoftware.jrun.JRunGeneric.handleConnection(JRunGeneric.java:116)
at com.livesoftware.jrun.service.proxy.JRunProxyServiceHandler.handleRequest(JRunProxyServiceHandler.java:130)
at com.livesoftware.jrun.service.ThreadConfigHandler.run(ThreadConfigHandler.java:96)


Problem 2 :
-----------
java.sql.SQLException: java.net.SocketException: socket available (code=10038)
at com.ashna.jturbo.driver.v.a(v.java)
at com.ashna.jturbo.driver.v.execute(v.java)
at com.ashna.jturbo.driver.c.commit(c.java)
at com.citibank.EnvDetection.db.DBManager.storeUserInfo(DBManager.java:377)
at jsp.install.gettingstarted.validateuserinfo._jspService(validateuserinfo.java:85)
at com.livesoftware.jsp.HttpJSPServlet.service(HttpJSPServlet.java:31)
at com.livesoftware.jsp.JSPServlet.service(JSPServlet.java:129)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:840)
at com.livesoftware.jrun.JRun.runServlet(JRun.java:321)
at com.livesoftware.jrun.JRunGeneric.handleConnection(JRunGeneric.java:116)
at com.livesoftware.jrun.service.proxy.JRunProxyServiceHandler.handleRequest(JRunProxyServiceHandler.java:130)
at com.livesoftware.jrun.service.ThreadConfigHandler.run(ThreadConfigHandler.java:96)

Problem 3 :
-----------
java.sql.SQLException: java.io.IOException: java.net.SocketException: JVM_recv in socket input stream read (code=10004)
at com.ashna.jturbo.driver.w.f(w.java)
at com.ashna.jturbo.driver.w.e(w.java)
at com.ashna.jturbo.driver.w.execute(w.java)
at com.ashna.jturbo.driver.w.executeUpdate(w.java)
at com.citibank.EnvDetection.db.DBManager.storeUserInfo(DBManager.java:375)
at jsp.install.gettingstarted.validateuserinfo._jspService(validateuserinfo.java:85)
at com.livesoftware.jsp.HttpJSPServlet.service(HttpJSPServlet.java:31)
at com.livesoftware.jsp.JSPServlet.service(JSPServlet.java:129)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:840)
at com.livesoftware.jrun.JRun.runServlet(JRun.java:321)
at com.livesoftware.jrun.JRunGeneric.handleConnection(JRunGeneric.java:116)
at com.livesoftware.jrun.service.proxy.JRunProxyServiceHandler.handleRequest(JRunProxyServiceHandler.java:130)
at com.livesoftware.jrun.service.ThreadConfigHandler.run(ThreadConfigHandler.java:96)


Problem 4 :
-----------
java.sql.SQLException: java.io.IOException: java.net.SocketException: socket available (code=10038)
at com.ashna.jturbo.driver.v.a(v.java)
at com.ashna.jturbo.driver.v.executeQuery(v.java)
at com.citibank.EnvDetection.db.DBManager.isPlatformSupported(DBManager.java:895)
at jsp.install.gettingstarted.checkplatform._jspService(checkplatform.java:45)
at com.livesoftware.jsp.HttpJSPServlet.service(HttpJSPServlet.java:31)
at com.livesoftware.jsp.JSPServlet.service(JSPServlet.java:129)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:840)
at com.livesoftware.jrun.JRun.runServlet(JRun.java:321)
at com.livesoftware.jrun.JRunGeneric.handleConnection(JRunGeneric.java:116)
at com.livesoftware.jrun.service.proxy.JRunProxyServiceHandler.handleRequest(JRunProxyServiceHandler.java:130)
at com.livesoftware.jrun.service.ThreadConfigHandler.run(ThreadConfigHandler.java:96)