INTERFACE_REGISTRATION_ERROR

Hi all,

I go on trying to communicate R3 with AII sending a message with material master data, the message is well sent from R3 to XI (SXMB_MONI ok) the message is then sent to AII but in this system I get the error of type ABAP 'INTERFACE_REGISTRATION_ERROR'.

Somebody knows why this could happen?? I'm afraid it could be a basis system problem and I had to reinstall AII again...

The detailed description is like this:

"No implementing class registered for the interface (type ifmmessif, name MaterialIn, namespace http://www.namespace.com/rfid )"

Thans and regards.