NOOBY question HELP!

So im making a flash intro for my website and i made all the graphics in photshop. The graphics are Gif with transparent backgrounds but when i put them int eh library of flash, they have white backgrounds and i cant delete teh white. I tried the function trace bitmap but it lagged flash like hell after it was done and i have a p4 3.2 gig and 1 gig of ram… HELP ME GET RID OF THE WHITE! I spent hours on the graphcs i hate them to go to waste