Hello CharQ. If you're trying to login to Sling TV, that may be the issue. Sling TV is its own entity, and wouldn't use DISH login information. You can pair your Hopper with Sling with the DISH Anywhere app, and that would use the same login credentials that you use on MyDISH.com; however, we haven't quite made it to Roku with our DISH Anywhere app. You can access is using any Android, Android TV, Fire product, or iOS phone/tablet.