Are the CB-1000's showing up in the Client Exclusion List.
Are your LWAPP AP's using the same IP Scheme as the Autonomous AP's?
I have had problems with other Symbol gear (wireless barcode scanners) and Zebra wireless printers when trying to use static addresses once AP's were converted to LWAPP - I would get a similar situation that you are describing.
I ended up using DHCP but putting in a reservation for those devices with the IP address I wanted to use.