Proxy Realm Error or Realm dead ??

Hi all, Found a problem on freeradius when I review the log file (detail-YYYYMMDD). The following is my proxy settings. default (proxy to 1.1.1.1) abc.com (proxy to 2.2.2.2) But I found some error entries in detail log. The username is test@abc.com and it's realm must be "abc.com" But in detail log, it belongs "default". Is there anybody have the same problem ?? Or abc.com deaded and the freeradius assign test@abc.com to new realm (default) ??? Rio