Problem with web.config IIS7.5

I am runing wordpress 3.3 Multisite on my Windows Web server every thing works fine for the default site but not for my sub domain sites created. When i try visiting https://music.tbestvalue.com it gives me the default page of II7 & when i try the admin panel https://music.tbestvalue.com/wp-admin/ all i see is a 404 – File or directory not found below is my web.config file

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