SWF with inside Modal Popup

I just solve a problem with SWF inside Modal Popup.

The weird thing happen between SWF and Ajax. It sometimes work and not work.

To make show swf in IE , I need to use SWF Object to render.
var fo = new SWFObject('temp.swf', 'viewer', '100%', '100%', '7', '#ffffff');

but there is still problem in Firefox which sometimes load up sometimes not.

Finally I need to put it on other IFrame instead of div.

<iframe style="border:none; width: 100%; height: 100%;" src="/temp.aspx?ID=<%= Content.ID%>" >
</iframe>

however It still cause a problem because I put the SWF Register Object using RegisterClient On backend... which Firefox does not accepted but IE accepted.

so Finally I need to put SWF object in front of Client aspx.

<%= Request["ID"] %>