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ejb2.x finder method not working

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I have got a really weird problem. Finder methods for one of my CMP EJBs are not working. I am using Weblogic 8.1 sp6, jdk1.4.2_05 and database is oracle 9i. The finder methods for other beans are working fine and returning me results, but not this ones. The corresponding oracle table has records and if I use jdbc, I get the records. The only difference in this bean and other beans is that this bean has a composite key and others don't.
I have total of 3 finder methods defined for this bean and none of these return any results. here are my classes and DDs

I have no idea what I am doing wrong. create methods are working fine, I am able to insert new records. If anyone has any clue why it is behaving this way, please help.

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