Heres the deal:
Well i have mine on my native tunge, so bear with me if the tabs aren't named the same!
You go to the directory with the wrench on it, preferences or so.
Then you open the firs program, controlpanel, the one that is a wrench!
Inthere there is a directory called connections or so, inside the directory you find the shortcut called Wireless Lan.
Then a menu pops up, with tabs. These tabs are status, network, preferences and security.
If you go to network, all avaliable connections should pop up, and you just find the one and press the button besides the screen that says make accespoint.
To get it to work, you will have to go back to the control panel and choose internetpreferences instead of wireless lan!
Here you will see all connections, mms, gprs, wlan and so on. Jus find your connection, press priorities on the left side buttons of the screen, and then just move it up to the top. When you press web, it will automatically choose the wlan as first connection...