Client is using 'desproxy'
http://desproxy.sourceforge.net to connect proxy server... to pass basic HTTP proxy server authentification, desproxy's using an environnement variable where login and password are stocked.
You must to create manually this environement vriable:
underWin9X/ME
Edit C:\autoexec.bat file. Add(at end of file for example) this line: SET PROXY_USER=proxylogin:proxypass
where proxylogin is the username and poxypass the password to connect to proxy...
You must to reboot.
underWinNT/2000/XP/2003
Control panel > System > Advanced > Environnements variables. you must create now the new environement variable : PROXY_USER=proxylogin:proxypass
where proxylogin is the username and poxypass the password to connect to proxy...
Now when desproxy is running, it's using PROXY_USER variable to connect server...
http://desproxy.sourceforge.net/manual-en.html for more help