It seems odd that your not getting "Autoguider Error" coming up on the Hand Controller.
One thing I found was that you had to have the autoguider cable plugged in on startup, and, I don't know which Shoestring thingy you have, USB, Serial, Printer Port, if it was the Serial or Printer Port version, you had to start the computer before the Gemini, I know it is the complete opposite with the ST4K.
Other than that
.
Cheers
John G