Did you know that Adwords will suspend your account if they suspect that it has been compromised by a third party? I found this out the other day after contacting support when I had restarted some campaigns and put up a new one but received no impressions.
For some reason I was never notified about this, but I could still log into my account and there was no messages telling me why my ads were not running. They were active but not getting impressions.
They told me someone would look into this and then activate my account again once the problem was solved.
So if your are having problems getting a campaign going and can't seem to figure out why contact support and they will check your account to see if there is an issue with it.
Anybody else ever experience anything like this?