What you need, IMO Pat.....is one of these.........
You probably have one already.
Jack needs to have his own little sanctuary. It sounds as if the night time, and/or solitary time has been unpleasant for him in the past. Just the ritual of taking him somewhere to be shut up on his own seems to cause him great stress, and most animals will empty their tanks in this state, as a natural prelude to fleeing the situation as quickly as possible.
When he is in his bed, he should feel safe, so that should be the place where only good things happen to him. Give him a small treat and make a quiet, calming fuss of him when he is there. Try not to reprimand him when he is having a lie down.
It doesn't really matter where his bed is positioned at this stage, as he is obviously in need of company and security. Take the bed up to your room at night for a while, until he feels a secure and valued member of the pack.
Once he is totally secure in his environment, and he knows that you are a kind soul, you (if you want to) can gradually move his bed to another location at night, but make it a fun exercise.
Lots of positive vibes, another litlle treat or fuss, and he will soon get to learn that bed time is something enjoyable, or just a normal part of his daily routine.
Personally, my dog has a bed in our bedroom (stowed away during the day), and one which is permanently positioned in the living room.....it's called a couch. She's happy on either, but she knows that each sleeping place is safe and that she can be near us if she wants it.
She usually doesn't bother coming upstairs, which is fine by me as she snores louder than my wife.
Routine......it's all about routine in the end. As long as everything is done in a positive way, and you give Jack a bit of time, he will be fine.
Good luck.