I can't really tell for sure from the htm file where your WOW sliders are placed, but it looks like one is on the main (1120 px wide) variant and has a transparent background and shows text "ph-Design, etwas für jeden Geschmack", "mein Webhosting, sehr schnell und zuverlässig", "Illustrationen, mach’s mit Stil und Aussagekraft", and so on. The other sliders are on the smaller 400px varaiant. These sliders are usually put to the page using placeholders. If you doubleclick them a dialog opens that allows to view the HTML code (body) and the HTML code (head), among other options.
Click on the HTML code (head) button and another dialog will open that displays the code Xara places in the head section of the created htm file.
What is shown in these dialog should look like:
Code:
<!-- Start WOWSlider.com HEAD section -->
<link rel="stylesheet" type="text/css" href="engine20/style.css" />
<script type="text/javascript" src="engine20/jquery.js"></script>
<!-- End WOWSlider.com HEAD section -->
Just remove the third row:
Code:
<script type="text/javascript" src="engine20/jquery.js"></script>
from each of the WOW slider placeholders to check if that is the cause of your problem.
Don't forget to click OK and Apply.