nobody causing issues with iSeries

Hi all, I’m very new to suse so please bear with me.
I have successfully installed suse11.1, updated it and added it to my domain.(strictly for testing). However, our AS400 operator showed me a message that says the following:
“User profile NOBODY disabled for iSeries Support for Windows Network Neighborhood… Profile nobody exceeded the max # of incorrect sign-on…”
The message then goes on to idenfity my suse PC and IP address.
Can anyone shed some light on why this is occuring?
Joe C.