digihome DV940B2 freeview box - lost lots of its channels?

I have just moved house, to the next street infact and my digihome box freeview box has lost lots of its channels. i moved, set it all back up and channels itv1, channel 4 and channel 5 became very intermitant. i retuned the box and lost itv1,itv2 and channel 4 completly. they just dont appear any more no matter how many times i try to retune the box. along with this, alot of channels show as being there, but when i go to that channel to watch it, nothing. the signal just disappears. i can get itv2 plus1 aswell as e4 plus 1 but itv2 and e4 more4 all gone. i have even bought a new booster box for the signal strengh to no avail. if i take the arial lead out of the set top box and into thew back of my tv i recieve very fuzzy images from channels itv1, channel 4 and 5, this i presume are the analogue channels still working at the moment? i live in leicester