Cavalier c5-225 problems

I have a Cavalier c5-225 with a coinco. s75-9800b.  I have replaced the power supply resistor and it accepts coins and clicks the front solenoid .  The problem is that it will not dispense a drink and will keep accepting money.  I can hold down the lever of the solenoid and it will dispense a drink but you have to hold the solenoid down again and push the vend button to reset the lever to dispense again.