can't connect to office wireless

Hi,

I have an older laptop (Dell XPS M140, purchased in Dec 2005) that is running Windows XP Media Center Edition 2002 SP3. It works fine. I am easily able to connect to my wireless network at home and at several of my friends' and family's houses. I just double-click on the Windows wireless Icon in the system tray, it detects the networks that are available, I choose one and click connect, I enter a password if the network requires it, and I'm on. It couldn't be easier.

What's driving me crazy is, I am not able to connect to the wireless network at my office. My laptop recoginizes the office wireless, and when I try to connect to it, it asks me for a password, but when I enter the password (which I know is correct), I do not connect to the internet. I don't get an error message - I just cannot get on the internet.

I did not setup the office network myself, but I know it works. My co-workers all use it, and we even give the password to people who are visiting for the day and it works for them too. We don't have to enter their MAC addresses, so I doubt there is any filter. This one particular laptop is the only one that I ever could not get on with.

I was just wondering if anyone had any suggestions as to anything I can try. Any advice will be appreciated.

Thanks in advance,
Paul