In reply to Matthew B: just got mine out so could check.
so your problem is there's no fuel getting onto the wick, so theres no flame to light the fuel released under pressure unless you tip it?
when you let through the first bit of fuel to prime it, it normally splutters fuel (often why could flare and why a *lot* of people don't like the dragonfly) and some should get onto the wick, which you can then light. I usually use a strike a light and it will light from the sparks. Once there is the flame from the wick then the vapourised fuel should catch and fire up (sometimes I try releasing several spurts of fuel in a kind of 'revving' action to get it really firing under control, rather than releasing a single stream of spitting flamenwerfer.
Try priming paste to give that first flame and heat the unit up a bit? diesel is really one of the worst fuels for getting to light as it burns off a wick poorly, once vapourised is fine though, I use petrol mostly and just clean the pipes every now and then,
Thinking again I have actually resorted to tipping the unit to get fuel on the wick, outside the tent though....
they do get a little of getting used to, but once mastered are no bother and will happily wake the campsite for years to come
chiz