wm.tn.doc:persist service error

Hi All,

I am trying to save the document in TN DB using the wm.tn.doc:persist service.
I am getting the below error when i tried to invoke the persist service.
[ISU.0000.9999C] java.lang.ClassCastException: com.wm.data.ISMemDataImpl

i am using the below steps .
wm.tn.doc.xml:recordToBizdoc
wm.tn.doc:persist

can any body have an idea about this error.?

Thanks,
-Harish