I don't have much experience with kegging, but I do know that when I bought a 50L keg from the pub (Tooheys New) I dispensed at around 180KPa.
Is the reason for the lower serving pressures mentioned earlier ("dispense at approx 45KPa") because the keg is smaller?
check the SG. maybe its already finished?
also check the seal. i know on my ferementer it needs to be very tight. i often need to tighten the lid on my ferementer a couple of days later (i assume because the o-ring dries out and the seal is no longer as good)
Thanks guys, that could be it. I've just moved house and the new place has a room under the house, kinda like a cellar and I put the bottles in there. Maybe it was too cold.
Will shake them and keep them somewhere warmer and see how I go.
I've been brewing kits for about 2 years now and only just started to get more adventurous. I tried culturing the yeast from a Coopers Sparkling Ale king brown to pitch into my brew. All went well for primary ferementation with SG dropping to 1010 and bubbling in the airlock.