Webpage opens but doesn't show content


I have the following problem on my pc. WinXP Pro.
There is one page that opens but doesn’t show content. It is a page within a website that I can access normally by logging in. After logging in there is a navigation menu. All links work properly but for one. When I click on the link the page opens, there is the word done in the left lower corner of the window but I don’t see the content.
Another website doesn’t open. Rottentomatoes.com. There is in de left lower conrner: waiting for the website and that last for a long time with no opening result. Till two weeks ago I had no problem with this website at all.
I use NOD32, Adware and the WinXP firewall.

Who knows a solution?

Kindest regards,