JMS Adapter DocumentToObjectMessage Conversion Error

Environment - WM6.1 on W2k
Weblogic 8.1

While using JMS adapter service to create a JMS objectmessage using above adapter service getting below error.

Any idea …i even tried converting simple objects like Integer , Float etc …all throwing same error

Any Service pack on this ?

[ART.114.505] Error while invoking adapter service com.wm.adapter.wmjms.service.RecordToJMSObjectMessage.