When you say that you are not getting enough voltage to the track, under what conditions?
Have you measured your track voltage?
What is the voltage of the power supply? Is it AC or DC?
Have your shorted out your track with a screwdriver to see if the booster shuts down? You should never run the booster on a power supply with smaller capability than the booster itself. That my prevent proper overcurrent shutdown.
There is a voltage set switch on the front of the DCS200, make sure that it in the upward, or G scale, position. If that isn't enough and your power supply allows it, you can tweak it upward. See your manual for instructions.
I also use the Crest power supply on one layout. It is enough to get about 18 volts on the track, but not higher. If you want more, you'll need to get a higher voltage source. 18 VAC or 26 VDC will allow 22 volts on the track which is enough.
BTW, if you use the Crest power supply, DO NOT USE banana plugs on the output jacks. A banana plug is only reliable up to about 3 amps. Instead, clamp a heavy wire under the nut.