error with NavX MXP connected to the Serial Port

[Sparkyshires]

Hey guys, title pretty much says it all. About two weeks ago, we installed the new NavX MXP and set it up. We downloaded their code from their github repo and we're using that. The only problem is that I'm not sure that I'm using it properly. I'm no expert in using the serial port on the roboRIO, and I have a feeling that something somewhere is going wrong. Does anybody know where this error might be coming from? our code is at https://github.com/Sparky384/Team384Year2015

Error on line 115 of SerialPort.cpp: HAL - VISA: Resource Locked
	at /home/lvuser/FRCUserProgram() [0x23b4c]
	at /home/lvuser/FRCUserProgram() [0x1194c]
	at startRoutine(void*)

Thanks for your time! If you have any questions about the code feel free to ask them. All the relevant gyro calls are in the drivetrain subsystem file.