I've taken this one before and have scored a 4 (after scoring a 20 before that; got lazy the first time; lol). Today got an 11. Have to admit I have little patience for doing these things, but I guess I might still have an issue since I'm not getting 0 (or my monitor might be a little off (lol). I did use a CRT the last time I did this and now using an LCD and don't have my glasses on currently so it could be a combination of a lot of things (or I'm still lazy and impatient which is more then likely the case; lol).
I got 20 on the first pass, then I loaded my monitor profile and zoomed in on a full screen page to get rid of the white background. Three tries later I finally hit 0.
Based on your information, below is how your score compares to those of others with similar demographic information.
Your score: 0
Gender: Male
Age range: 40-49
Best score for your gender and age range: 0
Highest score for your gender and age range: 1212
My wife and I both took it... I must say that I have known since I was about 6 that I had color vision problems so I was not suprised when I got a 133. Now the wife, she did pretty well with an 8.