unknown "Invalid attribute/option identifier" error

hi, i have a trigger in mssql wich should update a table in a msaccess database using the OPENROWSET, it is activated after an update action in the 'Item' table of the MSSQL

this is the trigger:

 /* Trigger body */ UPDATE  OPENROWSET('Microsoft.Jet.OLEDB.4.0','\\nas1\workware\OrderManager\MyData.mdb';'Admin';'********',Inventory) SET Barcode = Inserted.ItemLookupCode FROM Item, Inserted WHERE LocalSKU IN ( SELECT SubDescription3 FROM Item WHERE ItemLookupCode Inserted.ItemLookupCode) 

and this is the error it is returning me: [code] [OLE/DB provider returned message: [Microsoft][ODBC Microsoft Access Driver]Invalid attribute/option identifier] [/code]

Special Notes:

• The query was tested with good results, i used this for testing:

   /* Trigger body */ UPDATE  OPENROWSET('Microsoft.Jet.OLEDB.4.0','\nas1\workware\OrderManager\MyData.mdb';'Admin';'********',Inventory) SET Barcode = Item.ItemLookupCode FROM Item WHERE LocalSKU IN ( SELECT SubDescription3 FROM Item WHERE ItemLookupCode = '10155A54') 

• The mssql server daemon has full access to the "\nas1" device.
• The error its produced when I update the "ItemLookupCode" field in the real word, it means using the RMS Store OPerations Manager

Thanks in advanvce