IE7 Flash conflict with DHTML menu...

I have what I think might be a conflict on http://renom.com and I'm not sure how to resolve. My MooMenu dropdowns work fine in FireFox, as does the SWF below them. In IE7, both the menu and the SWF are very slow to react. If I turn off the menu, the Flash works fine. If I delete the SWF, the menu works fine. Can anyone here point me in the right direction? I'm not sure what to look for as far as solutions. I have tried SWFObject2 and an iFrame - no improvement.

Here is my SWF embed:

Code:

---

<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" width="925" height="400">
<param name="width" value="925" />
<param name="height" value="400" />
<param name="wmode" value="opaque" />
<param name="src" value="images/swf/showcase.swf" /><embed type="application/x-shockwave-flash" wmode="opaque" src="images/swf/showcase.swf" width="925" height="400"></embed>
</object>

---