Is my switch really communicating .1x with Freeradius?

Hello all, I am struggling to get a windowsXP client to authenticate to freeradius. I've set up winbind/samba and radtest works from the command line on the freeradius server. However the client doesn't seem to be able to contact the server when attached to a switch which supports .1x. During testing with wireshark I noticed that my switch (a 3com 3226) is sending EAP failure messages in response to the XP clients eap request. I don't see anything in the debug output of the freeradius server when I run it with /usr/sbin/freeradius -X It seems to me that my 3Com switch isn't really communicating with the freeradius server. Can someone help me figure out how to make sure that my NAS is talking to the server? Thanks! John