yep. i reakon what you have done is made the gap in the points too big. what you need to do is turn the engine over with the dizzy cap off and watch to see when the points open. loosen the screw just a little and close the gap abit. not all the way tho....then put the dizzy cap back on and try to start.
also check the wire that goes into the side of the dizzy and make sure it hasnt fallen off.