flash disappear after few seconds in ie6

My flash is working fine in all browser except ie6. During loading of page I see flash fine in ie6 but once page is loaded flash disappears. Looked everywhere but can not find solution.

in ie6 downloaded latest player WIN 10,3,181,34. version detected at http://kb2.adobe.com/cps/155/tn_15507.html

javascript file has

$(document).ready(function () {
    swfobject.registerObject("mymovie", "9.0.0", "expressInstall.swf");
});

Below is code in helper in app_code folder

@helper SwfObject(string swfName, UrlHelper url)    {
    <object id="mymovie" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" width="960" height="315" style="background-color: #e6e6e6;" wmode="transparent">
        <param name="movie" value="@url.Content("../../Content/flash/" + swfName)"  />
        <param name="wmode" value="opaque" />
        <object type="application/x-shockwave-flash" data="@url.Content("../../Content/flash/" + swfName)" width="960" height="315" style="background-color: #e6e6e6;" wmode="transparent">
            <div>
                <img src="@url.Content("../../Content/gallery/album1/large/1.png")" alt="Image"/>
                <p><a href="http://www.adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a></p>
     开发者_开发知识库       </div>
        </object>
    </object>
}

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swfobject.registerObject shouldn't be wrapped in a $(document).ready function or any similar onload functions, such as window.onload.

• Demo
• Tutorial
• The official example in the SWFObject documentation