Cannot find a configuration entry for module "digest"

Hello, Alan DeKok and other guys: I am trying to install radius and ser. i uncomment the digest in raiudsd.conf and create digest file and test in users file. now the problems are: 1) where should i put the digest file? 2) when run: radiusd -X and display can not find the digest modules. ----------------- ---------------- --------------------------------------------------------- ERROR: Cannot find a configuration entry for module "digest". -------------------------------------------------------------------------------------------- thanks lot! zhu