Controlling Zeiss Axio Observer Z1m

Hi,

I am trying to control Zeiss Axio Observer Z1m with the drivers I found in NI's driver network (here).

I am using a usb-serial connector. My LabVIEW version is 2013.

The connection is established, initialization and some actions work well, but then other actions result in an error.

For example in "Set Light Shutter.vi" in the drivers, opening and closing the shutter for transmitted light works well but running the same for reflected light results in an error and the shutter state isn't modified.

What could be the problem and what are my possible routes for fixing this?

Thanks,

Mai