Yeah, and not only that, but Cool's compressor is obscure and difficult to understand and use.
But if you insist on using it, here's an approach that will get you inside it:
1 Transform>Amplitude>Dynamics Processing
2 Attack/Release Tab
3 Ignore the bottom half (trust the defaults) and concentrate on the top half, especially the attack and release time. Start with 15 ms attack time, and watch what happens to the wave when you apply it. You don't want to squash it, you just want to tame it a bit most times. Try longer attack times and listen to it for a comparison. Try shorter times, and watch Cool squish the hell out of the track. Release Time will be longer than the attack time - try 5 times as much as the attack time to start with, and play around with variations and listen to them. I always find attack time to impact the sound much more than the release time.
But like roman was saying, you have to know *why* you're compressing a track = you have to know what you're trying to accomplish.