You probably flooded it take the glow plug out turn it upside down for an hr or so then try again don`t prime the carb too much 2 drops is all you need.
Edit: This is one thing I got in the habit of doing to stop over priming, I put in 2 drops then I turn on the radio and receiver and open the carb full bore before I try and start it, or you can just slide the carb out so the fuel drops down. I`ve found alot of times it just sits in the mouth of the carb then guys over prime cause it won`t start.