Flash menu in layer with wmode transparent

I made a flash header with a drop-down menu.

I placed the swf in a layer on top of the html-content of the website.

Problem:

All links that are right under the swf-movie (aka the layer) are not clickable.

How can I solve this problem so that all content underneath the layer with the swf is acessible ?

check out the following link to see the problem:

http://marco.dutch-cms.nl/index.php