Ron, every time you open a page on the web, the content gets dumped in to a cache on your hard drive - temporary internet folders.
The idea being that when you re-visit that page it opens quicker.
The trouble is it can get too full - all those little bits of information get clogged and your browser is sifting through it all.
I have an idea that AnswerBank web pages are very busy because, in part, of all those flash and java adverts.
I have my browser set to clear the cache each time I log off.
Read more about it from a more technical viewpoint:
http://www.microsoft.com/windows/ie/ie6/using/ howto/customizing/clearcache.mspx
That is for IE6 but I don't suppose it has changed too much.