[Serusers] Radius acc ERROR

Hi all, I've already successfully configured SER for syslog accounting, but now I'm trying to turn it to RADIUS accounting. - I changed the modules/acc/Makefile file (uncomment the following lines) : DEFS+=-DRAD_ACC include ../../Makefile.radius - re-compile & install (make & copy the new acc.so to the lib path). - ser.cfg : loadmodule "/opt/ser-0.9.6/lib/ser/modules/acc.so" modparam("acc", "radius_config", "/opt/radiusclient-ng/etc/radiusclient-ng/radiusclient.conf") When I try to restart SER (serctl restart) I get the following error mesg : Jun 20 14:45:12 xxx ser[19502]: ERROR: acc: can't get code for the Failed attribute value Jun 20 14:45:12 xxx ser[19502]: init_mod(): Error while initializing module acc any hint ? error on radiusclient conf / SER modparam conf ? thank you