The AP shows up in clients? Is it connected to a port on the controller (for example, is this a 600 series controller)? If so, you may need to configure the port as trusted.
Do you know if the APs were hardcoded in anyway prior to moving them? They will obtain an IP and attempt discovery (ADP; L2 broadcast, DNS lookup; aruba-master; or DHCP options). You can attempt to reset one of them by consoling into it. Stop the boot process and enter the following commands.
printenv (it will show the environment variables; if set)
purge
save
reset