Inbound AIF: Logon Failure

Hello,

I have a custom service I use to import data. I'm having difficulties since its throwing the following error in the Queue Manager:

The request failed with the following error: Failed to logon to Microsoft Dynamics AX.
View the exception log for more details.

I tried Refreshing the WCF Configuration in the Configuration Utility, but no luck. 

Any ideas?

Thanks,

Lyka Tasis