layering over the sample

the problem iam having right now is that i got my sample choped up to each pad i have my main melody down now iam trying to add to that with different parts of the sample with each pad it plays back untill i stop it after i stop it it doesnt play anymore

in programme mode hit the soft key with PARAM over it, look up and right to the screen and you will find a sign that says MONO, put the cursor on it and change to POLY. Then you will be able to layer the samples within your programme.