Sales Order Ack through email

Hi All:

When we try to send an email through the output type MAIL in VA02 transaction. We have the print program RSNAST0 and the corresponding routine is SAPOFFICE_AUFRUF_VX.

We need to have the SO Acknowledgment ouput in the PDF file. We are getting the mails with attachment but the pdf file is empty. When we try to debug, it did not stop while saving sales order application with the output type MAIL..

Please throw some light on it.

Thanks,

Venkat.