Flash is not displayed in IE8 (in ASP.NET MVC application )

Answer 1

Wrong path to your movie in the param?

                   <object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=8,0,0,0"
                        width="980" height="337" id="flashheader" align="middle">
                        <param name="allowScriptAccess" value="sameDomain" />
                        <param name="allowFullScreen" value="false" />
                        <param name="movie" value="../../Content/flash/header.swf" />
                        <param name="quality" value="high" />
                        <param name="bgcolor" value="#ffffff" />
                        <embed src="../../Content/flash/header.swf" quality="high" bgcolor="#ffffff" width="980"
                            height="337" name="header" align="middle" allowscriptaccess="sameDomain" allowfullscreen="false"
                            type="application/x-shockwave-flash" pluginspage="http://www.adobe.com/go/getflashplayer"&gt;&lt;/embed&gt;
                    </object>