Start over from the beginning. Use a NEW spark plug to see if you have spark. Use indian shellac/permatex #3/ OMC perfect seal, to reseal all the gaskets. It sounds like you lost spark somewhere. Another thing that happens alot is when you pull the boot off the plg it will pull the wire away from the boot. Try unscrewing the boot from the wire, cut 1/2" off the end of the wire, and screw the boot back on. You want to see a bright spark.