Thanks Arnan, but in my case with a 100 euros budget and a CPM of 100, I visit a page where the ad is impressed only one time, and the budget decrease 0,20 instead 0,10. It must be an aditional problem. What could be this problem?
On the other hand if the impress count doesn´t increase with an ad impressed by the limitations of the timer, but the budget decrease, it can happen that our customer see for instance 800 impressed of his banner in his dashboard but the budged is ran out and stop showing the banner. This is something that doesn´t give us security of using this utility that could be great. So I think we only can use the calendar settle the impress limit.