Ah, you couldn't get to sleep for your naps, which prevented the whole thing from working. My real issue was that I couldn't keep the schedule maintained for the nap since I usually don't take any naps and stay awake. Next time I think that I too will do 3/1.5 for like a week. Then I feel that I am too tired once I am adapted though I will have to switch to 4.5/1.5. I should try soon before exams start to set in otherwise I'll be messed up during that period and have to wait during the summer.
It seems that you tried this pretty recently when do you plan to try again?