Soldering Torch flame problem

[Muggins2003]

Hi all,

I was having trouble with my soldering torch so decided to buy one like the one I use in jewellery class but the same problem has arisen and it's time to ask the experts!

I use a mixture of propane and oxygen. I have regulators etc. in place. However, leaving the oxygen aside, I cannot get a stable flame from the propane. When I go to light the flame it either has too much power and can't light or it lights but the tip of the flame moves. I have tired adjusting the regulator to allow less gas through but then it doesn't seem to have enough power. Please see picture attached as I'm probably not describing it well. Any help you can give me would be great.

Thanks!