How to connect to the internet through broadband through ALFA USB adapter

Question

Hi everyone, I have question that really makes me mad.I searched every where and I couldn't find the answer.

Details:

I have broadband (Wan mini-port PPPOE) account from a wireless network near from us.I'm receiving the signal with grid and Alfa AWUS036H wireless usb adapter.In all of windows version I can connect through my broadband when I do these steps

1. setup new connection or network
2. connect to the internet
3. setup new broadband connection

then I but the ISP name(not Important just to remember my broadband connection) and then I enter the username and password then connect. I can find and connect to my wireless network but when I make DSL connection in Ubuntu 12.04 LTS and I enter the username and password I couldn't connect.

I tried this tool "gnome dial up tool" and that didn't work.

In other way..(how can I connect to broadband connection through ALFA USB adapter??) my wireless network have a servers when i check with winbox:

"mac address ip adress server name version router board version"

and I connect PPP through them.

Any answer will help me .

Thanks.