I for one would say I don't know how to help with the little info: you have gave, other than ask more questions.
how many boxes do you have on that they need to go up into another box ?
I keep my bees in tight quarters they can work better that way so I have been told. So maby you need to move them into the bottom brood box and if it is NOT full of bees ad a small super with the feeder in it.
But not knowin what ya have it is hard for me to help, now some of these old timers might give ya some good help soon.
"Life without God is like an unsharpened pencil - it has no point."