These are the possible things that might result in jetways not moving:
- You are not parked in the correct position
- You have the "Advanced animations" flag not checked
- You have another scenery in conflict, like a duplicate AFCAD or just another scenery.
- You installed AES and there's a problem with its configuration
- You redefined the CTRL+J key to do something else
- You are seeing jetways from too far and/or with too wide zoom settings, so the low-complexity model of the jetway is displayed, and that one is not animated.