00 (W) Sharan 2.o petrol AC problem

[PilotG]

Hi, wifes care AC does not work. AC light come on, system has been regassed and leack tested a- all ok.

I put my VCDS on it and got this error

VCDS-Lite Version: Release 1.1
Sunday, 24 June 2012, 16:22:18:36012
Control Module Part Number: 7M3 907 049
Component and/or Version: Klimabetaetigung 0101
Software Coding: 0000000
Work Shop Code: WSC 00000
VCID: F49B537FD7B5
Additional Info: Geraet 00000
1 Fault Found:
00631 - Communications/Connection AC <-> Motronic
007 - Short to Ground

any ideas where I should look to fix it?

thanks