Problem with Freeradius and WiMAX

Good day list This is my first post to the list, so let me open by congratulating on a great piece of software. I'm impressed. I have the pleasure of working with WiMAX and a system called 4motion. We have chosen to use FreeRadius as our AAA server, but are experiencing some problems. http://pastebin.com/m269e9250 As far as I can tell, everything is fine till I get the "[eap] NAK asked for unsupported type 21" error? Could anyone give me any pointer or ideas about what I am doing wrong, and how I can fix it? Sincerely, Kristoffer Milligan