All Columns not appreaing in Spool

HI Experts,

I have a function module which in executed in background and it uses reuse_alv grid function to create a spool which contains data in tabular manner.

But my spool is not containing all the columns of the fieldcatalog , but when ever i am executing a report( in foreground ) with same fieldcatalog and reuse_alv FM i am getting all the columns.

Can any one suggest how can i display all the columns of filed catalog in spool as it is displayed in screen( foreground ).

Thanks Regards,

Sandipan Jena