Connected with Limited Access windows Vista

I used to connect in my Smart_bro before but one day I got a message "Connected with limited access" permanently. I'm running vista and when i click diagnose problem it says There might be a problem with the driver for the wireless network connection adapter. I don't know what i did because it worked fine before i tried to set up the connection. I would really like to be playing live soon so any help or direction would be absolutely appreciated.

Welcome
Go to search
Type device manager
In device manager look for any small yellow markers, indicating problems.
If none go to the website of your inetwork adapters and update.