Welcome to the wonderful world of DRM (digital rights management), the whole point of which is to make it impossible to 'share' music like this and lock it to a device.
From a technical point of view I doubt that there is anything you can do about it, other than contacting Microsoft and convincing them to help you out...
From a technical point of view I doubt that there is anything you can do about it, other than contacting Microsoft and convincing them to help you out...