LX-Nano to SN-10B

So... has anybody successfully gotten the LX-Nano to be the GPS source for the SN-10? I've made my own RJ-45 cables to connect the two, but the SN-10 refuses to acknowledge that there's a GPS attached. My volkslogger blew up last spring, and we've not been able to make any use of the SN-10, outside of the speed to fly function which still works.

I feel like kind of a pioneer here, except a lot less smart.

I wired the Nano to the SN-10 with the wiring instructions on page 12 of the Nano handbook. Set the baud rate on both ends to 19200 (also tried 4800), NMEA. No soup.

Anybody got any ideas?

I have some bad feeling that it could be because of these reasons that I haven't yet successfully eliminated as possibilities, (ranked by most likely to least likely):

1) I'm not actually wiring it up in the way that I think I'm wiring it up
2) there's something subtle and different in the NMEA sentence structure between the Nano and the SN-10 that won't be fixed by wiring.
3) the SN-10 is busted somehow.
4) The USB-to-serial cable that comes with the Nano is busted somehow.


If there is anybody out there who has successfully paired these two devices before, I'd really like to know -- that way I can eliminate possibility #2 above.