Query In OLEDB Command

I am using OLEDB command with XML source.The query I am using is :

UPDATE  Table1 SET Table1.STATUS ='12'
from Table1 join Table2 on Table1.REC_NUM= Table2.REC_NUM
where  Table2.FLDCASENUM= ?  

IF I use the same query in SSMS and use a valid value in place of '?' I get expected results but in OLEDB Command in SSIS it gives an error saying "The multi-part identifierTable2.FLDCASENUM could not be bound "

In my XML source I am processing an XML file which has FLDCASENUM values that need to be mapped with TABLE2.FLDCASENUM

Thanks for your time and help.