J2EE & EJB on Websphere Application Server 4.0

We have a properly working version of jsp -> servlet -> ejb -> db27.2 on VAJ 4.0.
When we try to deploy the same application on Websphere Application 4.0 most of the flow is working but the updation into database is not working.
Please reply if anybody has faced this problem.
We are using DriverManager and not Data Sources.Could this be a problem?
waiting for some help.
Thanks in advance!!!

Yipes. Yes it could. You should NEVER try to use DriverManagers with EJB's. Bad things can happen (seriously screwed up transactions, etc). Switch over to using DataSources, retest inside VAJ and try again...
Kyle
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Kyle Brown,
Author of Enterprise Java (tm) Programming with IBM Websphere
See my homepage at http://members.aol.com/kgb1001001 for other WebSphere information.