How do I control an UniBlitz D122 shutter driver in LabView?

[apiper1]

I'm still learning in LabView and am currently working on trying to control an UniBlitz D122 shutter driver through its RS-232 port, but cannot get any response from the device. I am using a Mac with a RS-232 to USB adapter and LabView 2011. Here is my wire diagram below

Is there anything in particular that I'm doing wrong? Sending a decimal value of 65 should close the shutter but I'm getting no response. I know that the adapter is working as I've used it previously with another device.

Thanks for any help

[nyc_(is_out_of_here)]

You might want to use a Terminal program first to try to communicate with your instrument before diving into using LabVIEW.