11 wk old still sleeping in RnP and won't go to crib

ergranger

Our LO has great difficulty sleeping.  It used to take us almost 5 hours to put him to sleep in his crib and he would wake up every hour crying.  We tried elevating the mattress and swaddling him.  He hates swaddling and screams out loud.  We finally let him sleep in the Fisher Price RnP and he has slept much better. Tonight i tried to move him into the crib when he was asleep and he woke himself up crying again.  I am worried we will never get him in there. Did anyone ever have this problem? I feel like 11 weeks old is too old to sleep in the RnP but nothing else is working. he hated the bassinette as well. For those of you who transitioned to the crib, how did you do it?