What mode are you attempting to run the 1522 in? AP or bridge?
Your post seems a but unclear of what you did to connect the 2 units together.
How far away is the DAP from the 4500?
I presume if you are trying to set up a wired AP, that if you connect the wired LAN to LAN method, and use the DAPs wizard to set up the AP, and I think it should be able to just allow for DHCP IP addresses to come from the 4500, all traffic should be connected wired or wireless on the DAP and be routed from the 4500 thru the DAP.
Ensure the LAN cable used between the DAP and 4500 is a good working cable, swap out to be sure.