Is it possible in running manually you made it not repeat indefinitely? In other words made it a one time report vs regular reporting one?
Also check which user account is it defined under? If another account is used to try and view it it may not be visible. Do you have show all reports button turned on?
Try looking at report log history(lets you go back in time) make sure you have the right name as well as which user account has account access.
GLTU