windows vista - Silverlight 4 xap doesn't show up in Firefox, but works in IE -

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i upgraded silverlight 3 web project silverlight 4. had rebuild code in vs 2010 toolkit et al installed , host on server.

on testing, sl xap showed in ie 7 , worked expected. but, on firefox, xap getting downloaded doesn't showup. little bit of firebugging shows that, xap downloaded browser. right clicking page confirms sl runtime not loaded. inorder confirm had sl4 runtime, visited silverlight.net site , tested of showcase apps, show fine.

what should looking for, if xap getting downloaded successfully, not loading runtime? appreciate suggestions or questions. many thanks!!

the div hosting siverlight might not showing, or correct size in ff.


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