DAB Radio install,help required

[tc4332]

Hi All,
As the title says, I need your expertise.
I have just fitted a DAB radio.
Could not locate the correct aerial so I have used an after market DAB "stick on window" aerial.
After completion I stuck the key in the ignition lock, MMI popped up and there was the DAB radio.
It worked.
Showed it off to SWMBO, and off I went to ASDA. Oh horror, the reception was awful. Kept cutting out and the other wavebands had stopped as well.
The current situation is:-

1. With the key in ignition but not switched on the DAB band works correctly, but the other three do not.
2. Turn the ignition on and DAB stops working. MMI show the stations but with a line through the icons.
3. Turn ignition off, still no DAB.
4. Select AMI, or CD player, they both work OK.
5. Then select Radio and the DAB is working.
6. At no time do FM, LW or MW work.
7. Sat Nav works correctly.
8. TV seems to work but where the car is parked TV reception is very poor.

Has anyone any experience with this kind of problem?
Pretty please