I am trying to do exactly what is being demonstrated in podcast 281. I get all my data be daily date. I want it separated by month. I followed the directions on this podcast, but it won't work. When I right click on date and select group, I get an error box that says, "Cannot group that selection." Even if the date is the only thing I have in the pivot table, it still tells me it can't group that selection. I don't understand why. 
