Xbee RF Retail Kit - Uploading new code doesn't work?

Hello All:

I’m new to the Arduino platform and recently got ahold of the Sparkfun Inventor’s Kit and the Xbee Shield Retail Kit (the one that includes headers, 2x Xbee S1 modules and the FTDI USB board.

According to the product page, this should allow one to upload new code (sketch?) to the Arduino wirelessly however I’m not having any such luck. After reading several posts on the Xbee product pages, it appears that I’m supposed to set the mode switch to DLINE, then use the Arduino software as normal, specifying the FTDI USB chip’s serial port (in my case COM9) however it does not work.

I uploaded the ASCIITable and the Echo sketches to the Arduino and on execution, both perform as expected in respect to communications with the switch on the shield set to “UART”. If I set the shield to DLINE, I am unable to perform any uploads to the Arduino until I connect it directly via USB and change the Serial Port in the Arduino software. Additionally, with the switch set to DLINE, I get no serial communication out of the Arduino through the Xbee.

Is it possible to upload new code to the Arduino via Xbee or do I need to continue using the USB connection for upload.

Please assist, thank you.