Problem solved: the NextGen Gallery plugin needed to be modified, there was an </div> to many in the plugin-script (just showed with my theme, don’t know how other theme’s react).
Last one in the script, it works beautifully now!
I had it working! But now I have it in a side-content. You can take a look at my website at http://www.mobilia-magazine.nl/_mag/
I don’t know what your problem could be, I had it working instantly!
