IE6 alert msg "Press ok to continue loading the content of this page" appears when flash movie runs in aspx page??

<object width="268" height="200" id=ShockwaveFlash1>
<param name="movie" value="/images/xxx.swf">
<embed src="/images/xx.swf" width="268" height="200"></embed>
</object>

 How to fix this in ie6 works fine in ie7 and firefox??

Thank you in advance
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