COPA document was not generating for MTO scenario

Hi,

I configured COPA and for MTS (Make to Stock) it is working fine. And also creating COPA document.

But COPA document was not generating for the Make to order scenario (MTO).

I created one material and its release strategy is MTS. It worked finely for COPA.

After i changed this release stragety as MTO and now the copa document was not generating.

Please guide me in this scenario

Regards - Sateesh