Many issues, such as missing channels, can be fixed by “refreshing” your receiver. Please visit the My Equipment page and then select the “Refresh Receiver” link next to the receiver you’re having trouble with.
Unplug your receiver's power cord from the electrical outlet, wait 15 seconds, and plug it back in.
Press the Power button on the front panel of your receiver. Wait for your receiver to reboot.
Go to My Equipment to refresh your receiver again.