Thanks for posting in the forums! I'm sorry to hear you are unable to use the SlingPlayer application on you android phone. The reason you are not able to use the application is because it did not update to the latest version.
In your post, you said you are now using 2.2.1 after the update and it is not working. That must be why you are experiencing this issue, as the latest version of the application is 2.4.2. If you uninstall and reinstall the application, it may give you the latest version. If not, I would recommend contacting android technical support.
I have provided a link in this post that tells you information about the application. If you click on Google Play, it will take you to where you can purchase application. This also tells you the latest version of the application after you enter Google Play.
Here is the link:
Hope this helps!
The Sling Moderation Team