Please help our moderating team work more efficiently by not sending us support questions via PM. You can read more about how AppThemes support works here. However, you can send a PM to follow up and remind me if I missed your support request/thread.
As the Jomarkosabel spoke, you have to use a Text widget.
Do not forget that Google Adsense only allows up to three ad units per page, and that if the code is new adsense can take a while to advert to be displayed.