I'm right where you're at Thrawn -
First mod, not happy with the spider chip at all. Getting same exact results as you.
It's got to be in the connection of the 5 wires, and I think it's this:
I read about the fact that some 1.6 boards have some of the holes laquered over that you need to push the 5 wires into. The wires seem like they're going in a little way, but I'm not so sure they're actually making a connection. I pulled my board and held it up to the light, you can clearly see that the holes for the A,C and E wires don't go all the way through like the others. People are trying to poke out the holes with a small pin, but I haven't seen any results posted yet. I'm assuming that you could do this and maybe even solder the wires in place if needed, will post if it's successful.