Error Attaching files. CRM_P_ORD

Hi.

I'm working in a VAR SAP at Solution Manager SP17. I'm testing service desk trough transaction solman_workcenter.

The error appears when I try to attach a document to a support message. even if is the customer who sends the message or our support team, the same error appears when I try to attach a file: Operation is not allowed (CRM_P_ORD).

If I create the support message with an attached files from the transaction solman_workcenter, the message error also refers to an error conexion at RFC NONE.

Please could you help me?

Thanks and Regards.

Tomas.