Responsive Banner Slider doesn't show unless logged in

Hi,
I'm experiencing a strange phenomenon with the slider as it shows just fin when logged in. Inspecting the page with Firebug shows that the module indeed is published, the code looks just fine but the images does simply not show!!!

If you have a look at the site you'll find under <section class="tm-top-a uk-grid uk-grid-divider" data-uk-grid-margin="" data-uk-grid-match="{target:'> div > .uk-panel'}"> that there are two modules published; one with static banners (which I had to do just to please my customer) and one which doesn't show...

Url: clubsueco.com

Any clues on what could cause this?

Joomla: 2.5.24
Responsive Banner Slider: 2.2.4

Let me know if you need admin access!

Cheers,
Stefan

I looks like it's alright but it actually isn't! I had to choose slider type Adaptor Slider as Nivo Slider was generating the problem. But still it works and the customer is satisfied!

If you want to further look into the problem, please give me a shout!

BR,
Stefan