Thanks for contacting us here on the forums!! I'm happy to hear you were able to reset your password and log in on your computer. If you are still having difficulty logging in on Slingplayer, I would first suggest force closing the application and then relaunch it and try again. If this does not work out for you, I would then uninstall the app and re-install it. In most instances this will resolve the issue. If you still need assistance after you try these steps, please let us know!!
Hope this helps!!