Silly Bug:Forged My Thinking again!!

Since last few days i was involved in coding of some precision timer. As delivery dates crunch, i was putting much effort in to this and also expectation of quality was high!!..finally after much investment i could complete it up to my expectation and started testing....unluckily it has got crashed...i have started my usual process of debuging...but i could't trap the bug...than i have crossed that level and planned my debugging to go over all possible buggy situation...again failure!!!....after much effort on weekends I have traced the bug...and to my surprice it was not in the software...it was in the test framework..:(...I have missed/not taken it seriously  that in my plan...