Background ABAP program is not working

Dear Experts:

I've created an ABAP program & put that program in a backgroud schedule by the t-code SM36. The issue is that, the backgroud job shows the progra runs & finishes in the message from SM37, but actually it doesn't populate my required information. But if i run the program manually, it does exactly what i need.

For more clarification, in my ABAP program i've calling a function module which i created thru BDC for the FI transaction FB70. In that program i'm fetching some invoicing information which i want to upload in another compnay code. The function module is also running fine.

In this regards need your kind assistance to overcome this unknown issue.

Regards,

Kingshuk.