Problem with Silverlight 2.0

Hello, tried, today released the official Silverlight 2.0 version of Microsoft, had an older version 2.0 Developer installed and can not be uninstalled, the uninstall process runs, but cannot uninstalled it , the new version does not install side because appears that I first uninstall the old version to know someone like, and especially where the old version I manually delete it?

BS is Vista Ultimate 64-bit, thanks in advance!

Hi,

Do you get any error message if you want to uninstall the old version?

Hello, I get no error message, it will give me an uninstall window, which is building briefly and then disappears again and again, thank you again for your answers.