NPM Sensor Error

I keep getting an error while trying to add a DPA Network Sensor to a windows server.

- Error in deploying Packet Analysis Sensor.
Operation system running on node 447 has unsupported OS version 0.0.0.0
Sensors can be deployed on Windows Server 2008 64 bit or later, orWindows 7 64 bit or later.   32 bit operating systems are not supported.

The sensor is running on Windows Server 2012 R2 Standard (64 Bit).