If I paste your url into an adsense sandbox (here or here), the ads are showing.
So at least your domain has not been banned.
If I change the "client" and "slotname" parameters values of your ad code with values taken from another account, the ad is displaying (so you are using a correct ad code).
If I put your "client" and "slotname" parameters values inside the ad code taken from another website (that is working), that ad is not displaying.
So it seems a problem related to your account.
Check this troubleshooting procedure :