1999 Dodge Neon Car will not start

The car start, then two hours later would not start. Put in first gear, popped clutch to start the car. All dash lights, head lights and radio are strong, replaced battery two weeks ago. Removed the starter, Auto Zone test three time, starter is strong (no clicking noise when ignition was turned over), test electrical from ignition to starter had good voltage. Checked clutch sensor with metal by pass and the car would not start, I think the sensor is good. What else would stop the car from starting? Could it be the battery cables, altornator or is there some other electrical that should be check?

Thank you