Not sure how to load nails into magazine

Generally two reasons for nails not to make contact with driver. Make sure that the driver is returning to top of cylinder. If it stays in the path of the nail feeder, the nail cannot slide into position. Second, nails are not the right type or gauge for gun. Some nails even if they are the right gauge have a large head not allowing the strip to enter into chamber. Remove air hose from gun, check that piston is all the way up, then slide nails into chamber and see if they go all the way in easily with-out having to push. You should see the first nail in place from bottom where nail shoots out. The angle of the nail is very important. most pin nailers are 0 degree (not angled), but others have an angle. The gun should be labeled as to angle of nail. Hold a strip of nails against the outside of the magazine and see is the first nail is in line with the driver path. Good luck and post again if you have other question.