free RADIUS server + return class attribute

hi there, I want to configure the freeRADIUS server to return the CLASS attribute in the ACCESS-ACCEPT message,. I tried adding the attribute for a user in users file : vinay Auth-type:=CHAP,User-Password="vinay",Class="Admin" The attribute is parsed. But when i try to connect with a RADIUS client, the freeRADIUS server crashes. What is the correct method of passing attributes from RADIUS server to the RADIUS Client? Thanks Vinay