Stdanrs

Hi guys I'm after abit of help I have a mk2 focus st I do have a few mods but unfortunately my engine died on me so I desided to change the block for a complete rs engine I have done the head and block mods and is all times up perfectly but the engine just turns over it has a spark and is fueling but no ignition the only thing I have changed is the engine but I can't get it started at all as eny body else come across this of something like this it has completely blown my mind