Hi there. Currently the SlingPlayer Mobile for Windows Phone 7 is not enabled in the Norwegian Marked Place. From this forum I see that this is also a problem in Sweden (probably many other countries as well). I can not see any reason for you to discriminate on region, so I guess you just have not republished your app and marked it to be available for new countries added to Marked Place. This needs to be done once in a while, even you have marked it as available "world wide" - since the definition of "world wide" changes when Windows Phone 7 is deployed in a new country.