EasyGallery and Imagerotator, it seems they can not coexist on the same page of your website for a JScript conflict between the two extensions.
If in Firefox, GoogleChrome everything works right, as easily as in other browsers (unfortunately I have no time to test them all), the problem begins when your site is opened in that crap of IExplorer (all versions).
The error generated  by Internet Explorer is:

Unable to open website http:// .....
Or
HTML parsing error: unable to modify the parent container element before the child element is closed (KB27919)

Depends which versions you use.
Don't worry!. ... the solution there is!

Resolution to the problem

Open the  file Slimbox.js in the directory / mambots / content / easygallery /.
Comment the last line:
window.addEvent ('domready', Lightbox.init.bind (Lightbox));

At the bottom of file, add these two lines:

Save the file.
After cleaning the cache of your Internet Explorer,  finally your site works right in this browser.

Faq written by Speck Elxisitalia.com.