Don't feel bad, ortencia. I've done it once before. :
The replacement caps have to go in differently in order to work. Rimmer is correct when he says to flip the cap around.
Now, my mistake was replacing all the caps, but they were installed the wrong way. So I ended up blowing two caps (C8, C9, or C10) near the cable that supplies electrical power to the logic board. Luckily I cut the power before any further damage could be done. I flipped the new caps around and it booted okay, except that the sound chip(s) UB11 and UB10 were lost; I got distorted sound whenever a Mac audio was played.
If you'd like me to work on it, send me a PM and we'll talk.
73s de Phreakout. :rambo: