Creating Formatted Search in Issue for Production Form

Hi all SCN members,

I Have a question regarding creating FMS in SBO application. I have create a row UDF in Issue For Production Order based on this query :

SELECT (OITW.OnHand) FROM OITW

WHERE OITW.ItemCode = $[IGE1.ItemCode] AND OITW.WhsCode = $[IGE1.wareHouse]

and I have this FMS based on this criteria :

But when I entered a production order in Issue for production and choos the order no. the UDF field in the row doesn't show any results. Could you please tell me what I miss ? Thanks in advance.

Regards