The OSMO Hacker arrived and I tried it out but it didn't fix things. The robot didn't respond to the commands from the PC, even after trying to install this device. The next step is to make sure the interface is okay (by applying voltage to the inputs to see the output level is as expected with a Voltmeter). If that fails to work, which it may, I either have a bad robot and the communications port is damaged, or the commands aren't being sent as expected. I'll have to build an oscilloscope using my PC sound card to verify the communications.
Other notes, I have been sick for the last week or so and have been working more on my job search as well as working on personal economics and/or political things as these things seem more important than the Robot now.