Problem with swf file and vbulletin menu
 

Hello.
I set a banner in header of my forum.
this banner is a flash file (.swf).
now when I click on DHTML menu in navbar, menu contains go to behind of flash banner and invisible behind it.
you can test it at:
http://www.tarfandestan.com/forum/index.php
or see the attachment image.

(The language of my forum is Persian).

How can I solve this problem?

Attached Images http://www.vbulletin.com/forum/images/attach/jpg.gif tarfand.jpg‎ (105.5 KB)