Internet works (i.e. Messenger, etc) yet IE and Firefox do not

[Nozz]

Hi,

I am on a network with my roommates and we got the internet working for everyone but I am having difficulty using the internet with any browser (I have both IE and Firefox).  My messenger works fine and I tried going into the run>cmd> and pinging google.ca and it worked which my friend mentioned that it means the connection works. 

I was looking under network places and internet connection and it says it is disabled and when I click enable it does something and says enabled for a second but then becomes disabled again.  I am not sure how to correct this but this seems like it may be the source of the problem.

If anyone has any ideas as to how to fix this I would greatly appreciate to hear them.  I am going to try and reinstall a browser but not sure if this will solve the problem.

Thanks.

[Calum]

Has this ever worked?
What OS and protection do you have?
And how do you connect?

[Nozz]

It worked when I used Rogers at home 2 weeks ago.

I have Windows XP and connect through a network.

I have the Rogers Norton version that comes with the Rogers internet.