Need output as streamserve format..

Hi Experts,

I facing one problem ..

I designed one SF from one standard SF ,  F_INTITAR_SF

i used Output Format      XSF Output

          Output Mode       Spool

          Output Device      ZSTRS-XSF

and in SPAD , the formats of Devvice type XSF is

DINA4                S      DINA4

X_PAPER           L      ANY

but when the output is coming, it comes in OTF format..  

I want it as streamserve format.

Thanks..