Oracle Database keeps disconnecting - or something

Hello, Just in case anyones got any ideas. I've been testing an application for a few weeks on a test server without any problems. After releasing it onto the live server, which is - according to the administrator - setup exactly the same as the test server I've been running into problems. Apparently the database seems to be disconnecting randomly see log file extract below. I already had a application on the live server which has been working perfectly for a year or so. Now the new application is live it is having the same problem as well. The test version of the already live application is also on the same test server and both databases on live and test are setup exactly the same way. My administrator tells me that we have a license for unlimited connections to the database etc.. My setup us OCI8 Revision 1.96 Oracle Version 8.1 Apache Apache/1.3.11 Redhat Linux 6.2 php 4.0.2 I'm also using phplib 7.2c to manage authentication/sessions and database access. **** addition I have modified the phplib db class so that it does not use peristant connections. I would be very grateful if anyone has got any suggestions Regards, -Stewart PHP Warning: failed to rollback outstanding transactions!: ORA-01012: not logged on in Unknown on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-01012: not logged on in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-24324: service handle not initialized in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-24324: service handle not initialized in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-01012: not logged on in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-24324: service handle not initialized in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-24324: service handle not initialized in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-01012: not logged on in /usr/local/apache/phplib/session.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-01012: not logged on in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-24324: service handle not initialized in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-24324: service handle not initialized in /usr/local/apache/phplib/auth.inc on line 0 PHP Warning: failed to rollback outstanding transactions!: ORA-01012: not