My Roku device plays other channels (like You Tube) but I can't play shows on the Roku Channel. I've done everything I'm supposed to do, like unplugging devices, restarting the system, cancelling channel and adding it back—but I still can't play titles that show up. The Roku channel plays on my small computer, but when I remove the internet cable from computer, and move it to Roku device, Roku channel doesn't play on TV.