96 ram 2500 won't crank with key
 

Hey guys, need some help on this one. My truck had been sitting for a while and I lost the key so I took out the ignition switch so I could move the gear shift lock so I could move the truck. Anyways today I went and got a new ignition switch and a key made from dodge, and put it all together, put the key in the igntion and in the run position everything comes on. I go to crank and nothing. I look at fuses, relays and everything so far seems right. it's not the starter because I can go under and jump it with a screwdriver and cranks right up. What could this be? Thanks!