9210 Fax Problem: When I press Write Msg I get not found!!!!

I had the SIM card properly configured and everything
was fine. Now, the following error is appearing when
I try to compose or receive a FAX msg. When
I try to compose I get NOT FOUND. And when
I am getting FAX msg. the Communicator would
not answer.

Thank you for your cooperation.

With regards,

Rashad