Freeview tuner loosing signal when I turn on my rear screens

[j2d]

Hi,

I recently fitted a VEBA digital Freeview unit to the X5 with 2 amplified aerials, all works really well, even on the move,

but, when I turn on either of the 2 rear screens I loose signal on the freeview!!

Any ideas why this is happening?

Thanks in advance

John