[Users] Radius Authorization and AVP Retrieval

I'm having some trouble trying to integrate both Radius authentication and Radius AVP storage. I'm using freeradius and there doesn't seem to be much documentation regarding configuration semantics and such. Could anyone share some information on how they were able to use a Radius server to authenticate requests and (with avp_radius) as an AVP retrieval mechanism? I'm uncertain as to how I can stack these two uses of data on the freeradius server, the problem is that when a client authenticates (either INVITE proxy-authorization or REGISTER) the radius transaction is successfull and several SIP-AVP attributes are returned. Later on in the script i'm trying to use the avp_radius module (avp_load_radius function) to load SIP-AVPs for the callee which fails on the radius server due to the lack of digest authentication credentials in the radius requst. Is there some technique i can employ on the freeradius server to allow this second transaction? I'm not a freeradius expert and so i have not yet found a way to do this tavis