LabVIEW Com Port Error

[354.FIRST]

Labview problem is with the COM port.

CMUcam2 v1.01 c7

Error Code: -1073807202
Error String: Property Node in VISA Configure Serial Port (Instr).vi->CMUcam2.vi->CMUcam2 GUI.vi

We have the camera set up using labview. Everything works fine.
We have a second computer where we are playing with the c code.

Labview works on first computer. Gives the above error on the second computer. First computer is a desktop, second is a laptop with a serial port.

HELP. We have read all the posts and tried what we could. No luck.

Thank you very much for your help

-Team 354