persistance problem

SourceForge Submitter: boesler .
Hi,

I developing an project with JBoss AS 3.0 and it was
running fine (based on the xpetstore project). Now I
changed in this project to AS 4.0 (Windows XP, JDK
1.4). This was no problem without one thing:
When a new user logged in, a new account is generated
for him. This is realized by an create of an Login-Bean.
In my application the ejbCreate and the ejbPostCreate
Method are called by a session bean in this case (I see
two times output lbpc after passing on console), but
then the process does not turn back to the calling
session bean. I get no further information (black screen,
no exception), but Timer-Beans are still running. Then
after a timeout a rollback is initiated. The data, which
are set in a value-Object as parameter are set in the
Login-Bean, but not set in the database (sometimes
values are set, sometimes not. I could not find out a
systematic). In an other part of my software I use an
similar mechanism to create beans and there it's always
fine. I searched now already some days for a difference,
but I could not find one. Perhaps you have an idear,
why I have this mysthic error.