The problem is not with YTK Enhanced. If it were others would be complaining about the same issue.

Have a look at this link especially the portion that mentions required dependencies. Make sure all of those things are installed and up to date;
http://www.ytk.smfnew.com/index.php?topic=1442.0

One other thing to try is to reset your Internet Explorer to factory default.
Click Start, Click Control Panel, Click Internet Options, Click on the Advanced tab, Click Reset as shown below, Apply and OK.