If they won't eat live then something is probably wrong. Either you just got them + they're stressed, temp is too low or some other reason. Keep offering though. Also try the black/bloodworms it is a chance they were eating that.
what live food have you tried?
FD krill is prob your best bet if something isn't wrong with them then id say you are very lucky that they prefer non live
my 2-3 cichla are goin spastic of neons, barbs and convict fry...it's very odd that they aint eating live....try BW...if that doesnt work...then yea i'm stumped!