Back Ground Job Printing Problem

Dear Experts,

We schedled one back ground job with spool generation. Ecery thing is working fine but in printing selecton parameters are printing along with out put data.

That means, if i gave 1000 materials in my variant, in spool first 1000 materials are printing an then actually out put is printing. i need to avoid these printing of selection set.

Please help me...

Thanks in advance