Titanium client not seeing internet connection

[Busher]

I'm trying to set up the client on my laptop with the same client I downloaded 4 years ago and used to set it up on my desktop. I had no problem with that, but on the laptop the installation stops right at the beginning and say to check my internet connection. It's fine, but I did switch to a cat 5 cable just in case...same message.
Any ideas why the client install program can't see the internet on my laptop? My desktop is running Vista, the laptop is running 7 pro.
Thanks