Some HD channels do no open on cable tv

[VesaT]

I have a problem with a couple of HD cable tv channels that are decrypted as they do not open with a CI card reader but most other decrypted HD-channels open up. I have a paid channel card in a CI card reader, and OpenVIX complains something like: "this channel requires a CI+ compatible device…". I've tried to add these cable tv channels to CI-settings (normally it should be just the service provider), but no change. The card reader is Conax CSP CI+ CAM.

Is there something within OpenVIX that requires some extra settings or some limitation as these channels open perfectly ok in the same box (Vu+ Solo4K) using OpenATV 6.3?