things can act weird if the battery is ALMOST completely drained. try jump-starting it, getting a battery charger or just a new battery and see if that fixes it
if that doesn't fix it, you probably didn't connect a wire or incorrectly connected a wire to the starter. that fatty cable that goes to it is a direct link to the battery. that could be a LOT of juice directly grounded.
if that doesn't fix it, you probably didn't connect a wire or incorrectly connected a wire to the starter. that fatty cable that goes to it is a direct link to the battery. that could be a LOT of juice directly grounded.