Oracle connection closed prematurelly

I've got lately some problems with the oracle connections. I can't use persistent connections because they are closed and not recovered so i changed to non persistant everething works fine.. but i still have some conections error but they always ocurred after the script execution is finished... The problems seems to be that the connection is closed prematurally, or at least is that what the oracle support says, here is the session trace attached... Greetings Sergio

Attachment: [application/octet-stream] ser_2585.trc