SCADADPack LP

When I connect an Airlink modem to Com2 of the SCADAPack, everything including the power supply powers down on me. Everything was previously working before. I can still talk to the modem from my pc via serial, and I can still talk to the controller from my PC. Nothing is fried and is working, but as soon as I plug the RJ45 into the controller, everything instantly goes down.

The Com settings are:
Modbus RTU
Full Duplex
9600 Baud
RS-232
DB9(modem)
RJ45(SCADAPAck)

Anyone ever have a similar problem?