Dell 610 wifi problem

Hello...first post. I have an issue that hopefully you guys can help me with...

I have a Dell 610 that I am troubleshooting for one of my users and it seems like the laptop will connect to the access point and it says "connected"; however I cannot navigate to any sites. It gives me a "detecting proxy settings" on the lower status bar, and acts like it wants to find the site, but then the entire page goes blank.....including the address bar.
Laptop works fine when data cable is plugged in.

Anyone ever have this problem and if so, how was it resolved?

This is John, a customer advocate at Dell headquarters.

I can't really begin to help you here until I know a few things:

What brand/model of wireless router are you using?
Are you using any encryption? If so, what are you using? (WEP, WPA, etc)
Are any other wireless devices having problems with this network?
Can your laptop connect to any other wireless netoworks? (coffee shops are good places to test this generally)

There are more questions I could ask, but this is a good place to start. I'll do what I can to help!

John
Dell Customer Advocate