IE & Netscape not working

I am using Win2k Pro. I can ping every where on my office network. When opening IE I have this error: “IE could not be open the search page”.
When opening Neetscape, I hav this error: ” Netscape was unable to create a network socket connection. There may be insufficent system resources or the network may be down”. So now I can’t surf the internet. What could be the problem. Your help is very much appreciated.

Thanks
jchow