[Serusers] New to SER, got some questions

Hello, I have a problem as well as a couple of questions which don't seem to be covered in the documentation. 1) I successfully got an installation of SER running with a MySQL back-end and Digest Authentication. I've added a user with the following command: /usr/local/sbin/serctl add 2000 pl00p4f daniel.junkmail(a)gmail.com Ultimatly, 2000 is the username (phone number of the SIP UA) and pl00p4f is the password. I've verified that this user is in the database: mysql> select * from subscriber where username like '2000'\G *************************** 1. row *************************** phplib_id: 8ba7accc847208eb10eb6baa6373f89d username: 2000 domain: eglobalphone.com password: pl00p4f first_name: last_name: phone: email_address: dcorbe(a)gmail.com datetime_created: 2005-04-16 19:47:09 datetime_modified: 0000-00-00 00:00:00 confirmation: flag: o sendnotification: greeting: ha1: 8ba7accc847208eb10eb6baa6373f89d ha1b: 711817121ed6cae7e44837e3fddf78d4 perms: NULL allow_find: 0 timezone: NULL rpid: NULL 1 row in set (0.14 sec) However; I cannot log into my proxy server. I keep getting 401 Unauthorized back. Here's a libpcap capture of my session. Also attached is my ser config file. I'm not sure what to do or what 2) And speaking of the SER config file, I have a question about the userloc module What is the difference between www_authorize/www_challenge and proxy_authorize/proxy_challenge? Thank you for your help. -Daniel