Knock Out Traps

I may be wrong, but could someone just glance at the code behind knock-out traps and the sandman edge. I have both with knock-out traps in the high 80% and the edge itself. The edge there is no syntax on how to use it other than it is "working" no matter what ingredient you use? I ask because I have placed hundreds and had 32 attempts on players with a 0 success rate (with the sandman edge). In fact, out of the all the traps I have laid for knock out in the history of character, I have had only 1 succeed. Thanks!