Try going into TiVo Desktop under the Services menu and select ‘TiVo Server Properties’. Click the Network tab and check which discovery protocol you are using. Use Bonjour if you’re not already using it. Then click on the Access Control tab and check the access to your TiVo’s.
S2, S3 (OTA), TiVo Hd, Premiere (OTA), Roamio Basic (Comcast Cable).