I suspect these guys signed a very deep confidentiality agreement as I tried the same thing with two ex Videoway gamedevs with the same results.
My driver is currently out of date with the current MAME classes (most probably). I would need to brush off on it, funny as I was just thinking of this last week.
I have dumped a boot trace of the device up till the point in shows the "cannot connect" window, so there might be something we can do.
I can also bus pirate the thing to figure out how it works more, but short of homebrews, it is somewhat pointless. Getting access to at LEAST one dump might raise my interest up