I guess the asking of the question contains the answer, but I'm going to put it out there anyway.
I got started less than a week ago with my new Ping. So far things are great. One problem I've had, however, is when I have the pump on my hip (clipped to my pants) and I bolus for a meal from the meter. Twice now I must have moved during the bolus and caused it to press a button on the pump and cancel and I didn't hear or feel an alarm until a couple hours later.
Should I be locking the buttons whenever I clip my pump on (probably, I guess)? Or is it possible that when I put my meter away I'm hitting a button which causes a cancel? Is this a common problem?