I know this is going back over old ground but can you confirm that everything is connected OK:
Stalk with with extra loom (4 pins)
Brake switch - 4 pin (not 2 pin)
Clutch switch - 2 pin
Also have a look at the following:
http://www.astraownersclub.com/vb/showthread.php/590379-cruise-control-Zafira-A
(there is another link in there which may be useful)
fitted brand new stalk with extra loom 4 pins
checked brake switch, 4 pins already.
fitted clutch switch - tested with op-com - works
I think You are missing the point, Cruise control is disabled in ECU variant configuration.
When trying to enable it, it gives me error - "programming failed", example 9. step.
In this discussion people suggested me to purchase op-com instead of looking for mechanic with tech2 to enable the "cruise control". Now, when I try to enable it with op-com, i encountered this problem.