I got also three campaings ready that I created last week when I opened the account. The campaing status was first "active" after I created them (when no payment was yet made), but then they changed automatically to status "stopped" (or paused? not sure of the english term, as I have the interface in other language). (thought that naturally they are automatically stopped as there are's no money available before the payment arrives)
However, the payment has arrived a day ago and I cannot activate the campaings. No matter what I do, they all still say the same "stopped". Tried also making a new campaing, and it goes automatically to the same status.
Contacted also Google's support, but they are yet to send me their normal liturgy "thank you for contacting us ..blah,blah". 6 days of plain waiting and haven't been able to display a single ad yet - "great system".
(not sure if this has been discussed here before .. didn't find via search. But did find a lot of other informative material ;-) )