Roamio won't keep internet connection

All other computers in the house can still get an active connection to the internet. Rebooting router and modem does not help. We always have to reboot the Tivo. This does bring back the connection, at least for a short amount of time. We are having to reboot the Tivo multiple times a day! This is unacceptable, and we have only had the Roamio about a month.