I try to follow Scotts introduction for Azure on this page: https://www.windowsazure.com/en-us/develop/mobile/tutorials/get-started/
But already at point 4 when I intend
A few users seem to be running into this issue and as far as we can tell its related to having multiple subscriptions on your Azure account, some of which are not enabled for Mobile Services. Can you try the following:
If this does not work, can you please mail me at pbatum@microsoft.com so I can follow up?