Fixed my problem, although, I have no idea why/how.
IP addresses-
DSL MODEM - 192.168.2.2
DIR-655 - 192.168.0.1
DAP-1522- 192.168.0.50
Set the 1522 to have a default gateway (inadvertently entered the wrong one) - 192.168.0.254. When I did that, everything started working correctly. I would have thought the default gateway should have been - 192.168.0.1. I don't have a .254 on my network. Strange, but it's working now, so I won't complain.
Check if that fixes it for you, perhaps it will, perhaps it won't.
G/L
John