Did you initialize the door controller after initial power up via 19 >> 28 >> DGP >> Option 3? This will wipe all memory in the controller, then perform a full download and try again.
I would also compare the site code/offset from a working four door controller with the one installed, and check last card badge on the new door controller to see what it is reading when you badge(19 >> 28 >> 4) and if it is correct.
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