1998 Hyundai Accent replaced crankshaft sensor

Before I replace the crankshaft sensor that the hand held computer said I need. I took out the old crank shaft sensor, cleaned it up put it back in, then tried start the car it turned over about 4 times and then stop dead, like motor froze now I replaced the old crankshaft sensor, with brand new one does same thing and it done the same thng it try to start but turns over a few times then stop dead, like motor freezes then hit start again it will turn over few more times like 15 times the stops like motor freezes.
whats my problem, the car was starting every time as long as I let it set a few hrs after I started it and let it run til it died in about 10 minutes. I will donate for correct anwser $10.00 why does my car act like its freezing up becasue I bought and put in new crankshaft sensor. Remember it done it with with old one when I cleaned it up put the old one back in. Do think I got bad crankshaft sensor, might need new or another crankshaftsensor, need help bad