PM:Transaction code IW3D

Hi,

   When I use transaction IW3D to print work order,I can able to print.

But I use this transaction in module pool programming to print work order.My program is calling this IW3D,but when I try to enter,the papershop is not coming .I am not able to print.please screen above .Image may be NSFW.
Clik here to view.

SET PARAMETER ID 'ANR' FIELD AUFK-AUFNR .

CALL TRANSACTION 'IW3D' AND SKIP FIRST SCREEN.

Can some body throw light on this issue?

With Regards,

Jaheer