Hi,
Ok take out and clean spark plug up and get nice and dry with cloth. Place plug in cap and then end of plug on metal part of bike, this will earth it. Then try and start it. does plug spark? You may need a mate to help to see. Spark should be nice and blue and easy to see. If no spark then replace plug try again, followed by cap and lead and then yes then coil. You could get someone to test coil.
If it does spark but you are not getting it to fire the plug may well be fouling. Too much fuel getting onto bike. If this is the case then re post it could be one of many things
BB
July 2009