staple-gun

Don,t know if anyone else has this problem, but I got a fairly new Bostitch air-stapler(oilless); and it seems to chatch or hang up the staples on the loading mechanism. So, in reality, I leave those few staples stuck there, n then load some staples in front of them to make the gun work. Seems like i,m spending more time checking for staples than using the gun......is thier an adjustment i,m missing. Also, some times it shoots blanks( now I know you gonna have fun with that remark, but)...second time I fire it I get a staple to work. For as little as I use this thing, you,d think it work flawlessly. Any suggestions appreciated.........