Stihl FS 55 Weedtrimmer wount start

Hello! This is my first post, and I feel pretty desperate.

I have just recently changed the coil and the carb, they are both brand new. The coil is mounted in place, with the correct distance from the magnets.

After this repair, I got a spark out of it. But it still wount start. When I pull, I occasionaly get the random cough out of the exhaust, or a small bang. So it is misfireing. But I cant see how I can adjust this, and quite frankly I have run out of idêas.

Things I have tried;

Changed sparkplug ( 3 diffrent types )
Checked the muffler for crabonbuildup
Checked the cables for the igniton

I hope there are some clever minds here who could give me some good tips on how to proceed. I have uploaded photos of the exact carb and coil I have used.

Thanks in advance, and sorry for my English. I hope I could make myself understood :)s-l1600.jpgs-l1600 (1).jpg

Attached Images

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Stihl FS 55 Weedtrimmer wount start