[Serusers] how to log in softphone?

Dear all, I'm new to SER. I wish to use softphone X-lite on SER and radius in db_mode. I have installed SER 0.8.14 (by tarball) and Mysql 3.23.54 in Redhat 9. I have added some subscribers into DB "ser". And after I added some users in the file: /usr/local/etc/raddb/users as the document "iptel.org SIP Express Router v0.11.0 -- Admin's Guide"(http://www.iptel.org/ser/doc/seruser/seruser.html#DEFAULTSCRIPT) guided in Chap 3.3: joe(a)iptel.org Auth-Type := Digest, User-Password == "heslo" Reply-Message = "Authenticated", Sip-Rpid = "1234" I could log in X-lite and make calls. Now, how could I log in X-lite by using the users that DB contains rather than those in the file: /usr/local/etc/raddb/users? Many thanks. Shuai http://www.godentek.biz