Hi Folks

I am new on this forum so I just thought i would say high. Also, has anyone come across this problem:

I have a 2001 Passat 2.0 SE, When i lock the doors (which sets the alarm) after agbout 30 secs the indicators start to flash as if the alarm is going off but there is no sound. This stops occasionally but starts again. Vag-Com gives me these codes

Address 46 -------------------------------------------------------
Controller: 1C0 959 799 B
Component: 06 Komfortgerát HLO 0001
Coding: 00258
Shop #: WSC 00028
3 Faults Found:
01134 - Alarm Horn (H12)
77-10 - Internal Supply Voltage - Intermittent
01134 - Alarm Horn (H12)
37-10 - Faulty - Intermittent
01134 - Alarm Horn (H12)
49-10 - No Communications - Intermittent

Any ideas?