Hey Carlos,
Welcome to cbid forums. As for your problem. Did you season your humidor??? If not, put a shotglass of distilled water, in the bottom of the humi. Your humidity should come up soon, once the spanish cedar, absorbs enough of the moisture. It can take several days, up to two weeks, depending on the humi, and how dry it was. Have you calibrated your hygrometer. Do a search on salt test, to find out how.
I would recommend getting rid of the credo, and going with climax beads. I do now. After 20 years of smoking, and storing cigars, I finally have my humi, and coolers, keeping consistant humidity.
Have a great day, and I hoped this helps.
Later
Dave (A.K.A. Homebrew)