yes that seems to be the situation Swede... Unfortunately I can't find the stargas elios software (if it exists) anywhere on the net.
feeling deflated now. Basically I'll have to sell the car for £600 because of a stupid small issue as this.
not to self no: 38383 - check the LPG system before buying a car.
thanks to all
I'd have a look at the solenoid on the front - Easiest way to tell is whats been said above, check theres pressure on the vapour side once you've heard it click (the front should click as well, though its hard to tell for sure). If you pull off a pipe once its tried to switch and theres no pressure there then either it isn't operating the solenoid(s) to allow anything out of the tank, or theres a restriction somewhere along the supply. Equally as said above you might have damage to the wires under the car, though running a jack underneath it should reveal anything as it should be visible.
Any idea on the tank type? Single hole you could have a proper look at the solenoid valve if you can shut the gas off and access the valve, not as easily possible on a 4 hole tank. Either way front solenoid is possible cause, and can be checked by removing the solenoid post - if theres gas upto this point something is stopping it working, could be a gunged up post, failed coil or the wiring having some sort of issue, all should be able to be confirmed without purchasing bits or having access to the software. Just be aware that if you do have pressure behind the coil that it will get cold on releasing it, so best done somewhere well ventilated with gloves.