Internet Sharing in V5

[WMFan85]

I just downgraded to V5 due to the internet explorer not holding a connection with the data service and I'm having troubles with the Internet Sharing. I had this problem with V4 also. When I open it up, it won't let me select anything. I can hit the drop down menus or connect or the "x" but nothing happens. I'm using the internet sharing out of the windows folder. Is there something you have to do to make this work?