I recently upgraded from a Premiere XL to a Roamio OTA (Lifetime/All-In) in our living room. I love the DVR, I reverted to the old UI. I also have an A93 TiVo Mini box in our bedroom. Everything is hard-wired, gigabit ethernet. At first the Mini saw the Roamio with no issue, however I could only stream live TV. If I tried to select a recorded program from the host DVR it would not even present a "play" option. If I hit play on the remote I received an authorization error (error # V125). In the diagnostics section of the Mini the TivoToGo shows the permissions as "a,a,i,a" which I think might be part of the issue. I got my TiVo support case escalated to executive support who after several days came up with the solution of removing the "Video sharing" authorization for an hour and then re-adding it back on. After doing so, I've now lost all functionality with the Mini. It can no longer see the Roamio. Tried a "Clear and Delete Everything" and I now receive a V70 error through the guided setup and cannot proceed any further. My only options are to power cycle the Mini and keep trying unsuccessfully. I had already disabled all IGMP snooping on my two switches, the DVRs have static IPs assigned by the router and nothing on my network has changed since the TiVo rep turned off Video Sharing. So I suspect it is a technical issue on their end? This issue has being going on for almost two weeks now, and I'm just considering throwing in the towel and purchasing a TiVo Mini Vox just to test it and rule out any internal network issues. Can the new Mini work on the old UI or does it force an upgrade? Also any other things I might be overlooking as far as troubleshooting the connection issue? Thank you in advance for any advice!