Distributing an iphone application over the air using IIS 6.0

I want to distribute an iphone app over the air. I am following the instruction from this link: http://aaronparecki.com/How_to_Distribute_your_iOS_Apps_Over_the_Air

My web server is IIS 6.0. On webserver I - added MIME type (ipa and plist) - share web access where .plist file was specified; - full security access control of the .plist manifest file

When I clicl to the ITMS service link: // action = download-manifest & url = http://mydomain.com/test/myApp.plist from my iphone I have the following error "unable to connect www.mywebsite.com"

Any idea?