Facebook not working properly in IE, but does in Firefox.?

Recently my IE 7 won't let me poke back or remove headlines from my news feed. However I can do both in Firefox. What is add on is missing or disabled in IE that I can't do these tasks anymore? Thanks.

Facebook not working properly in IE, but does in Firefox.?windows media player 10

Great program to get the bugs out, Microsoft Live OneCare

XP Users http://onecare.live.com/site/en-us/defau...

Vista Users http://onecare.live.com/site/en-us/cente...

Run the full scanner

Cheers