More electrical problems

So, i just got my brakes working, now im having ignition problems. the car will start if i keep the key in the position of starter position (just let off so the starter will stop turning) the car will run fine, but when on the on position it dies. i had it started and running fine earlier, but after i turned it off and went back to start it it started doing this, i dont have a ballast anymore because i got MSD, what would be the problem?