Hi,
For each version of the Flash/Silverlight , the uploader render different layer to activate the Flash/Silverlight object.
If Flash version is 10 , Silverlight version is 3 , the uploader will move the layer over the button.
I am not sure what issue you get now , can you post some code , or screen shot to descript it ?
Does the uploader not work for some PCs ?
Regards,
Terry