What you do is this:
1) Go to your Network pane in you OS X "preferences"
2) Make sure that is says "no connection" (THe other oprions I think are DHCP, Boot etc)
3) Save any changes
4) ( You might need to reboot)
5) Open PPP connect ( a program in your apps folder )
6) Fill in Name, Password, number, and the DNS server #s
6) press connect
This is the proper way to supposedly getting it to work, mine "connects"
but I get no where... hope this helps you