Problem with links

[lockdude]

Hello everyone. I did a quick search and didn't find anything, so here's my problem:

I've noticed over roughly the past 2 months that some links don't work on some sites.
The one I need to work now is the link to the graphing calculator on CoolMath.Com. I have Java enabled on the browser (firefox), but I still can't get it to open. I click on it and nothing happens.

Does anyone have any suggestions as to how this problem can be corrected? Thank you for your time and have a great day. 

[patio]

There are a few links on that site that will not open on my end...contact the Webmaster.

[lockdude]

Thanks for letting me know you had problems with their links too. I've corrected the problem as far as getting that particular link to work. However, I now have a problem with getting the graphing calculator ap to work. I have the Java plug-in. Any ideas on what's wrong there? It won't show up at all but works fine on my other machine running Vista.