The main issue is that the HTC HD2 Mobile device is not included on the supported Mobile devices list. This means that even though you can download and install the application, it might not work properly.
The following link will provide you with all the information about the supported Mobile devices. Additionally, on the right hand side of the screen you will find the options about how to purchase the Registration Key for all the supported Mobile devices.
The Slingbox Answers Forum Moderation Team
Is there a way to make it work again
I purchased the 29 dollar app last year from windows market place and it worked fine
Now it gives resolution problem alert
will it work on htc hd2