Dish Network Hopper User Manual page 120

Reference
Troubleshooting Tables
Menus
What Is Happening
You were using a menu, and it
suddenly closed.
114
Possible Reason
You may not have done anything
with the remote control or front
panel buttons for several
minutes.
What to Do
The receiver has a time-out feature that
closes any menu after several minutes of no
activity. This will discard any changes you
have made, but otherwise does no harm to
the receiver. Start over again.