[amsat-bb] FT-736R question

I am testing an FT-736R with the intention of selling it for the estate of a SK here on Maui.

I have it running with PCSat32 and it tracks frequency as expected and I have successfully heard myself on FO-29, AO-7 and VO-52, however I am unable to tune the radio manually.

Am I doing something wrong, is it a problem with the CAT interface, or is this not possible?

I would appreciate any help.

73 and Aloha, Tom, NH6Y (BL10ts)