If it cranks and does not fire, it could be a fuel pressure problem.  Listen to the fuel pump.  When you turn the key to the on position the system pressurizes.  It sounds like weeee-rrrrrrrr.  The rrrrr part is a change in pitch that occurrs when pressure is built.  When the system is hot, listen again.  If it sounds like weeee (without the change in pitch), the system is not building pressure.  Cycle the key 3-4 times until you hear the weee-rrrrrrrrr sound and then try to start it.  If it fires, the probelm is with the fuel pressure.