TexasCHLforum.com

I also use Firefox, but I think this an answer for you.

At the top of IE7:
click Tools
Click Internet Options
click Privacy
drag or click the slider to "low"
Then click apply, and OK.

For the chat feature I think you need a Java download, or Flashplayer. But I can't call it for sure.
I normally look for both anyway. They are both free
Flash player at http://www.adobe.com/products/flashplayer" onclick="window.open(this.href);return false;
Java download at http://www.java.com/en/download/index.jsp" onclick="window.open(this.href);return false;