Many people have problems inserting flash files in masterpages . The following code is the correct way of inserting flash file in a mastepage . It will work in all situations <object classid=”clsid:D27CDB6E-AE6D-11cf-96B8-444553540000″ codebase= “http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,19,0″ width=”663″ height=”105″ title=”Serious Reading….”> <param name=”movie” value=’<%= Request.ApplicationPath + “main_anim.swf” %>’ <param name=”quality” value=”high” /> <embed src=’<%= Request.ApplicationPath + “main_anim.swf” [...]