How to retrieve an XML data from a column in DB

After successfully establishing connection with DB

SQL = "Select * from EMP_MESSAGEQUEUE where WHERE SALESORDERID='MCI-130425-z0S3AL13' "

If oConn.State = 1 Then
oConn.Execute(SQL)
msgbox "executed"
selectedRows.open SQL, oConn
do until selectedRows.eof
EMP_val=selectedRows("EMP_PAYLOAD")
msgbox EMP_val
selectedRows.movenext
loop
oConn.close

End If

where column EMP_PAYLOAD is of "XMLDATA" type in DB. , but at the place "oConn.Execute SQL" it is prompting error.
Also tried with executing stored procedure still the execute command is throwing an DB error. Could you please help on te executing the stored procedure.

Thanks,