As I understand it, you bit whatever is necessary to achieve position x - not higher. If you are always ranking higher than this (e.g. good Quality Score) then your bit will not show.
Try removing the position preference if set - if not, ask G.
I have 200 keywords that are all 'active' and now I see that only 20 are really 'active' even though all of them get impressions occasionally.
If i could see this situation on the screen easily then I'd up the bids or adjust ad text or something.
To say a keyword is 'active' and then have a little popup that says it really isn't active because the bid does not meet the minimum requirments is absolutely absurd. IF I CAN SEE THAT MY BID IS TOO LOW THEN I'D AT LEAST HAVE THE OPPORTUNITY TO RAISE IT.
Adwords is evil
Sorry for shouting.
What does this mean?
Your ad is not being shown for reasons unknown to the Ads Diagnostic Tool.
What can I do?
Our engineers have been notified of this problem with the Ads Diagnostic Tool and we are working to resolve the issue as soon as possible. We apologize for any inconvenience and appreciate your patience.)
When I check the keyword in search the ad is showing. It seems like a glitch in the system, not surprising as it is new.