click sound on sample start

If I play back a sample and then stop it prior to the end of the sample, there is an audible click at the start of every subsequent sample I play back. The only way to avoid this appears to be to allow every sample to play all the way to the end before triggering a new one. This basically means I have to fade out the pc output, skip the file to within a couple of seconds of the end and wait to play the next file. I've had this problem on 2 separate pc's, any idea how to stop it, as it reduces the usefulness of what would otherwise be an excellent program .

Thanks, Pete

v4.O.1.4