I check your hub, I can see Adsense ads.
You know, sometime Google may not have suitable ads which match to your keywords. Then you may not see ads on your hub. Also Google may not have suitable ads for your country as well. Do not worry, if you have a Google adsense account, you can track your Google ads by creating a "URL tracker".
I hope this answer would help you. If you need any further info or help let me know. Im happy to help you.