If you are using the browser Firefox, you may not see your ads because Firefox blocks them. Check to see if your ads show up in a different browser. I use Chrome and Opera (I hate I.E.). If you still don't see them you might need to clean up your browser cash, or run a system clean up app link Ccleaner.
But before you go to all that trouble, try a different computer, laptop, tablet and see if the ads show up. The last resort, asked someone to check your site on their computer. Also ask for some help in the FiveFigureMastermind Skype group.