Can't disable Yahoo Toobar, PLEASE HELP

I accidently added the "Yahoo Toolbar" to my MIE-11.
I followed the standard instructions for removal.
I went to "Tools" then "Manage Add Ons".
The list of Add Ons appeared. When I click any other Add On in the list the "disable" button lights up.
When I click on "Yahoo Toolbar" the "disable" button does not light up so I am unable to get rid of the toolbar.

While on MIE11, I tried clicking on the "X" at the left side of the Yahoo Toolbar. Two choices appear : (1) Hide Yahoo Toolbar temporarily (2) Disable Yahoo Toolbar permanently.
I can Hide the toolbar but when I click on the option to permanently disable the toolbar I get a message that says "This action is restricted. Contact your system administrator".

Went to control panel uninstall software , couldn't find Yahoo Toolbar on the list !!!!

So -- Anyone have a solution to my situation ?

Thanks ! :mad: