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I cannot open wmv files since I upgraded to Firefox 4.0

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Since I upgraded to Firefox 4.0, when I click on a link that is suppose to opens wmv file, it turns black momentarily then turns to a white screen. I have copied the web address to Google Chrome and Internet Explorer, and it works. It previously worked with Firefox 3.5. Please help.

Since I upgraded to Firefox 4.0, when I click on a link that is suppose to opens wmv file, it turns black momentarily then turns to a white screen. I have copied the web address to Google Chrome and Internet Explorer, and it works. It previously worked with Firefox 3.5. Please help.

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Could you check in Tools | Options | Applications and make sure WMP is the player selected to open that type of file. You can select it from the list if it isn't.

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WMP is the player selected. Another suggestion?

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