So I'm still trying to find a sampling tool that's really gonna work for me after having left the world of FL

I'm trying Kontakt 2 right now but having issues as usual. I send my sample to the ting and it plays off the key, but when i got into the loop editor or whatver tryin to edit the wav, but the sample isn't even displayed. it says set range or some ****. I just want to get to choppin already. can Anyone help?
can you even time stretch and **** in this or am i just fully wasting my time wiht this?