Assembly containing type xxx was not referenced (AX 2009)

Hello! I applied a KB (KB2790534) in a test base of AX 2009 and now I'm receiving two error messages in the createBinding method of the EFDocMsgTransport_WebServiceV4_BR class (these messages appear in portuguese to me, so I'll translate them; the translation may not be accurate, though):

Assembly containing type Microsoft.Dynamics.NfeCustServiceModel.CustomTextMessageBindingElement was not referenced.

Object 'CLRObject' could not be created.

I checked the references and the Microsoft.Dynamics.NfeCustServiceModel.dll was already referenced. I even tried adding it again. I also restarted AX service, to no avail.

Can anybody help me?

Thanks in advance!

Luiz Bezerra