[Serusers] authentication failed when use freeradius to authenticate

hi, I'm using ser-0.9.3+freeradius-0.9.1+radiusclient-ng-0.5.1.When I use "radtest test test localhost 0 testing123" to test the servers,it returns "rad_recv: Access-Reject packet from host 127.0.0.1:1812, id=235, length=45".And the radius prints: rad_recv: Access-Request packet from host 127.0.0.1:34012, id=235, length=56 User-Name = "test" User-Password = "test" NAS-IP-Address = 255.255.255.255 NAS-Port = 0 modcall: entering group authorize modcall[authorize]: module "preprocess" returns ok modcall[authorize]: module "chap" returns noop rlm_eap: EAP-Message not found modcall[authorize]: module "eap" returns noop modcall[authorize]: module "digest" returns noop rlm_realm: No '@' in User-Name = "test", looking up realm NULL rlm_realm: No such realm "NULL" modcall[authorize]: module "suffix" returns noop users: Matched DEFAULT at 152 users: Matched test at 226 modcall[authorize]: module "files" returns ok modcall[authorize]: module "mschap" returns noop modcall: group authorize returns ok rad_check_password: Found Auth-Type Digest auth: type "digest" modcall: entering group authenticate ERROR: No Digest-Nonce: Cannot perform Digest authentication modcall[authenticate]: module "digest" returns invalid modcall: group authenticate returns invalid auth: Failed to validate the user. Who can give me any instructions?Thank you:)