Hey Getson,
the message trace after the the resetcontentdescriptor works, the trace has problem intrepreting the message becuase it don't recognise jms_text but the message should be okay.
So the J ...
The ReceiveDispatchSend business service that Siebel provides will copy the messageID to the CorrelID. I tested that with Siebel developer. You can do a trace to verify it.
It seems that MQSI will reset whatever you put in the mcd msd to xml (if it was a xml mesage)if you do this via a computenode.
One way is to use the messagedescriptor to reset it to jms_text. (I have ...