my 9 month old son absolutely refuses to sleep in his crib. the cry it out method doesn't work either we spent 3 hours trying that the other night and all it did was make it worse. if you go in and try to comfort him it makes him cry more the only thing that settles him down is if i lay with him until he goes to sleep. he also doesn't sleep through the night yet.
Have you tried to go outside before sleeping?
Tried a white noise maker?
Has he been used to sleeping with you all this time?