Webif channel change


Hi, I recently purchased a VU+ Solo SE. I am running Open ViX Apollo 062 image with Magic-HD-Noire skin.
Finding my way around, and now have a question. When running OpenWebif and displaying a Bouquet channel list I find that clicking on a channel name does not change to that channel. Instead the TV goes blank with the message “No free tuner”. I know it’s only a single tuner box, but had expected it to change channel, not look for another tuner. I have used another single tuner box, not with a Vix image, where the channel does change. The box seems to lock on associated TP, so only channels on this TP are available, including on the remote.
Is there a setting I need to check? By the way clicking on the initial channel name that does open again.

Thanks in advance