Hi there,

Is the code you are changing within an "<img>" tag? If so, that will be why as the params will not call an swf file to display.

My swf's all use "<object>" tags
i.e:
<object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0" width="800" height="600" id="YOUR FILENAME.swf" align="middle">
<param see more name="allowScriptAccess" value="sameDomain">
<param name="movie" value="YOUR FILENAME.swf">
<param name="quality" value="high">
<param name="bgcolor" value="#333333">
<embed src="YOUR FILENAME.swf" quality="high" bgcolor="#333333" width="800" height="600" name="YOUR FILENAME.swf" align="middle" allowScriptAccess="sameDomain" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer">
</object>

Bearing in mind you would of course amend the height/width values to match your file.

Regards
Matt