google has jacked minimum bids through the roof over the last 6 - 12 months. i'm guessing all of your ads are actually inactive right now because your minimum bid is too low and you have a bad "quality score". Their UI is sort of a pain.
login -> click into your campaign -> click into your ad group -> on the set of tabs to the right, click "keywords". here i'm guessing you'll see that your campaigns are inactive and you have to bid between $5 and $10 per click...which I'm guessing will be prohibitive. 9 months ago you just had to bid the minimum and you would end up paying <$1 per click, but now you will actually pay $5 - $10 per click.
the crazy thing is that there is zero transparency into this market. funds try to bet every quarter on google's earnings based on comscore, etc. but they have no idea what the average CPC is doing. it's like betting on Exxon based on car usage w/o knowing the price per gallon.