How can I get my 2 year old to stay asleep through the nigtht?

My son i s having a lot of problems with sleeping through the night and I really don't know what to do. I have the bed time routine in place of bath, brush teeth, story time, say our prayers, I sing lullaby's, and then its a hug and a kiss good night. But he will not stay sleep during the night he either wakes up crying and runs in our room or he gets up and comes to our room and climes into bed with me and my husband. I have had to stop letting him take naps because if he does he will not go to sleep until 10 or 11pm and we play the up-down game until he stays in bed and goes to sleep. This is an every night thing that has been going on for awhile now and my husband and I are very tired and don't know what to do. Can anyone please help.