Arrow ET200 Electric Brad Nail Gun "stapler put staples properly" Questions

...stapler gun it worked for about 15 applications then just stopped, it's not jammed, it has staples loaded properly & firing off staples repeatedly doesn't work nothing comes out??? Why would it just ...

...put nails in 1/8 of inch. I just bought this yesterday so maybe this a defect or is there something I am not doing. I bought this because I am not good with a hammer. keep hitting my fingers. So at ...