flash blink/flick in updatepanel problem

Hi, 

I have a problem, when I put a flash movie in an aspx page

 

<objecttype="application/x-shockwave-flash"data="./flash/map.s
wf"width="780"height="372">

<paramname="movie"value="./flash/map.swf"/>

<paramname="quality"value="High"/>

<paramname="wmode"value="transparent"/>

<paramname="bgcolor"value="#ffffff"/>

</object>

 

I also add a dropdownlist with auto postback.

 

The problem is when i select on dropdowlist the flash movie blink/flick for a
second

 

any idea?

 

thank you

 

Choo