Could you be more specific? I'm not sure I understand what your question is.
Are you advertising on Search or Display? When you say your ad doesn't show up, are you saying you're searching for it in the live environment or are you using the ad tool?
Google AdWords Top Contributor
Thanks for your post. As Theresa mentioned, we need some additional information to try to understand why your ad may not be showing.
If you use the Ad Preview Tool, you should be provided with some information which might help you to resolve the issue. More information about using the Ad Preview Tool can be found here.