roster management help needed

A minor problem....
In my roster I have 15 player...among which 3 are reserve..but I can't use them in a game because they are not in bench...
but when i try to put then in bench from roster management it shows " can't assaign minute on a un-activated player"..how to activate reserve player..pls help

i think it's changing the role.

Try to interchange the position of the reserve player and an active player.

yeah..u need to decrease min of a bench players so that you have free min to assign..then swap one of the player on bench to the reserve player and add min. back..