Problem with YM, script error…. Help…

I had a problem with my Yahoo Messenger.
If I start a new chat, appears like this :

Trying to uninstall & delete YM folder can’t solve that.
Then I try to maintain with Tune Up Utilities 2008 and Lavasoft Ad-Aware 2007.
After that, I installed another version of YM (version 8 & 9), but that error still there.
Trying to re-install IE7 also can’t help my problem.
Anyone can help me ?
Answer #1
try to downgrade your YM.. or try using trillian..
Answer #2
Downgrade still not work.
Answer #3
well, do you already try another way?? if so, i guess u must reinstall ur os, mate
Answer #4
try to reinstall it..
however u also can try to repair ur registry using registry mechanic or what else..