Can anyone give me some advice? I've just bought a freeview box, Philips DTR1500, and set it up as per instructions. The problem is that only about half the channels are visible and those that we can get keep freezing and full of mess. Is it just that the aeriel needs re-aligning, is the box no good or is it a problem with my location, NW Norfolk? Please advise as I may need to return the box as its present performance is of no benefit. Thanks.