Message Mapping activation error

Hi..

I am using PI 7.1.

I am not able to activate any Message Mappings. i am getting the error as

" Source text of object Message Mapping: MM Name!namespace name has Syntax Errors ". Source code has syntax error.

I tried with standard RFC's also, getting the same error.

Pls suggest me how can i rectify this problem.

thanks in advance,

Pasi