I am unclear as to how you have connected the unit. I have an earlier model, and also have looked at the instruction manual for this model on the Panasonic site.
The aerial lead should be connected first to the RF-in on the unit, and then using RF-out, to your TV. I am unclear how the Sky+ box effects tuning the Panasonic unit.
As you know, you can only view anything from the PVR via the scart lead.