[Danny Diaz]

Okay, we are pretty sure we know your problem. However, don't thank me, thank Joe Hershberger (I swear, it's uncanny how fast he processes stuff like this).

Anyway, MAC Address Cloning is probably turned on in your DAP-1522. You've got to turn that off. MAC Address Cloning requires ARP traffic in order to get a MAC address to clone, and since the cRIO boots up first it does its gratuitous ARP way before the DAP is done booting - so, the DAP never sees anything to "clone" until you press the reset button on the cRIO - at that point the cRIO boots up, gives a gratuitous ARP, and the DAP clones that MAC Address and starts communicating.

Again, Thanks to Joe Hershberger if it works.

-Danny