help with uddeim notifier

Hello I've succesfully installed uddeim and uddeim notifier on my site running on joomla 1.7.2.
Everything works ok except for the notifier popup.
Looking at the source code I realized what is causing the problem:
<div id="floaterDiv" class="floaterTranslucent" style="left: -450px; visibility: hidden;">
Manually changing through FireBug to +50px and visibility: true, I got the popup.

Any ideas how to fix this problem?
Thanks in advance

The CSS is fine. The Javascript code changes the settings when a new message has arrived. Ensure that no other module uses the "window.onload" event.

...and - of course - enable the module, the floating box, the popup messages in the uddeIM backend settings, the popup messages in your personal uddeIM settings in the frontend.

...and read the FAQ.