Error while running free radius server

  Hello, I am getting following error while trying to run free radius server on linux machine rlm_eap: Failed to link EAP-Type/md5: file not found /usr/local/etc/raddb/eap.conf[17]: Instantiation failed for module "eap" /usr/local/etc/raddb/sites-enabled/inner-tunnel[223]: Failed to find module "eap". /usr/local/etc/raddb/sites-enabled/inner-tunnel[176]: Errors parsing authenticate section. I downloaded and installed free radius server (version 2.0.5) from freeradius.org on linux machine. Please help to resolve the above problem.