the Ad header disapear's. when a paste the HTML code from google adsense
Make sure the code you're using is correct. Try reverting to the default WordPress theme and see if the code works there. I suspect it is either an issue with your ad code or your adsense account not being active yet (or some sort of conflict with it). Flavor displays verbatim any ad code you input and does not touch it or modify it, so if it's not displaying it is not likely Flavor's fault.