Seeeduino Next Generation - Stalker

Hi, Stalkers

A newbie question: how do you connect your Stalker to USB? I've wired a FTDI/USB of Sparkfun to the stalker's FTDI bus (tx->rx, rx->tx: is it ok?), but when loading a sketch, one LED is on, an other is blinking, Sparkfun's txLED blinking, arduino console says "uploading", but nothing else happens!
Where could be the problem? Should I choose another board from arduino's menu? Which one? Using Arduino21.

Could anyone help, please?
Thanks a lot
Andrais