Hi, just bought a freeview box from maplins. airial connected to direct into box from wall socket, scart lead into tv av2, when first switch on from main socket freeview comes on great, then after about 30 secs it goes off and says " Bad or no signal" so my sky kicks in and comes on. If I switch off my sky from the mains, then my freeview comes on. my freeview wont work while sky is on. can anyone help please