allright dont listen to any of the stuff others had to say. i had this problem also. i have a samsung p2 and i am runnin vista home premium. it would say error code 10. and wouldnt show up under my comp. i searched for hours heres the solution.
Net localgroup Administrators localservice /add
type that into your command prompt and it fixes it. no kidding would not lie. i thought it would mess up my computer but it didnt. if it keeps saying access is denied make sure you are signed in an administrative account and right click the command prompt icon and press luanch as administrator .