Then you should set your adsense code with hubpages to show your own google ads in your hubs. To do that follow below steps,
My account --> Affliate Settings --> enter your adsense ID (ca-pub-XXXXXXXXX) in the box allocate for google adsense "Affliate Code". Then set it.
If you do it correctly status will change to "Active" state. Further you would receive an email from Google. Follow the steps in that email to allow access HubPages to Google to show ads,