Did you properly season your humidor? How long has it been in use? How many cigars are in it? Once you've stored cigars in the humi for a lengthy period of time, the tobacco will overtake the wood smell you are experiencing.

I have a coolidor as well, and like Bill, once I got it set up and filled with cigars, boxes, and beads, the only thing I smell is tobacco. I did clean my cooler out very well with bleach and let it air dry in the sun for several hours when I first set it up though.