primus MF problems

[virgin camper]

Hi all ,new to this site and camping and having major problems with my new stove ,so hope someone can help
I have bought a Primus Eta Power EF und MF stove and the first time i lit it and done the preheating thing everthing was fine and had a nice blue cone shaped flame { with unleaded petrol} however since then i have been unable to repeat the feat with umpteen strip downs and cleans , someone please help

[ngovgroup]

I think it is normal since it is still new but I recommend to put it on clean and safe place so that it will not rust.