search help attribute BUK

Hallo,

setting up SRM 7.0 backend ECC 6.

In PPOMA_BBP I have an issue with attributes search help.

When I need to select the company Code for attribute BUK, the search help returns no backend values.

I cannot understand why as also when I need to select the cost centre for attribute CNT, the search help regularly returns the values from the backend.

Problem happens with attribute BUK, BSA and BWA.

I have 2 RFC set up to backend - of which one is dialog - as for suggested customizing.

Would you be able to help?

Regards,

Marco