CD Changer buzzer

My wife's octavia 1.9tdi 54 plate.

She's had trouble starting it, and so had the battery replaced today.

When the new battery was fitted, there is now a buzzer going off constantly in the boot. Sounds like the CD changer.

It happens when the key is both in and out, cd's in, and removed. The changer still works ok.

Has anybody come across this problem before? It's doing my bloody head in!!

EDIT: NOW SORTED;

Edited 11 December, 201114 yr by billysbones