editing drums

i am trying to edit drums. i have a snare trck and i edited hitpoints. i went through the track and found a couple of snare hits that didnt sound good, so i cut and paisted a diffrent one fron the track. well this was a while ago and im just getting back into it again and cant figure out why i cant here each individule audio sound. i no when i did it before i could hear each audio hit now i cant. anyone no

Could you try and describe what you are doing a bit better please?

Are you talking multi-tracked drums?