Hey Shacknasty.
I had the same issue as you here in Auckland. In my case the tp3 - 666000 was not reporting signal despite line-of-site to both the SkyTower and the Waitaks. I have just had a Aerial guy over who replaced most of my dodgy old bits and tinkered around (I had UHF, VHF and SKY dish in some unholy configuration). After much useless tuning suddently I get PRIME along with another 9 channels on TP3. I am not sure what fixed it but I would guess a dodgy connection. Not sure this helps other than to indicate signal issues rather than MediaPortal issues as mruane suggested.
I had the same issue as you here in Auckland. In my case the tp3 - 666000 was not reporting signal despite line-of-site to both the SkyTower and the Waitaks. I have just had a Aerial guy over who replaced most of my dodgy old bits and tinkered around (I had UHF, VHF and SKY dish in some unholy configuration). After much useless tuning suddently I get PRIME along with another 9 channels on TP3. I am not sure what fixed it but I would guess a dodgy connection. Not sure this helps other than to indicate signal issues rather than MediaPortal issues as mruane suggested.