Posting cost elemet catogory 1 to COPA via SD billing

Hi gurus,

I want to post some cost elemets with CE category 1 to COPA but the system gives the error message KF755.

We have condition types in SD and and these are posted with CE category 1 by the SD. We want these postings to go to PA object like CE category 11 and 12 rather than cost center.

Can you help me?

Thanks in advance

Ahmet