Hello Craig,
First off, welcome to the forums! Thumbs Up
I'm not familiar with your rig, but if the chips were unburned and didn't produce any smoke, it's because they didn't get hot enough to combust. They have to be close enough to the heat and get hot enough to smolder, which will make smoke.
Need more information about your setup to really offer any useable advice:
What kind of container are you placing the chips in?
How close is the chip container to the heat source?
Have you verified your smoker temperature with an accurate, independent thermometer? (Often, the factory thermometers in box store smokers are wildly inaccurate...which means you may not be cooking as hot as you think you are)
Are you soaking the chips before putting them in the smoker? (Agree with crazzycajun, soaking chips is a waste of time...the water must evaporate before combustion will begin to make smoke)
Lastly, even if the pit temp is accurate, 200 may not be hot enough to allow your chips to smolder...you might try cooking at a temp of 225-250.
Also agree that an A-Maze-N Smoker might solve most of your problems...something to think about.
Red