XPort shield causing trouble enumerating USB device

[gharp]

I'm wondering if anyone has encountered this before and/or has advice:

My USB device is "having difficulty" when I attach the XPort shield to the arduino board. When I load a script (in this case the Botanicalls Twitter script) it works fine as long as the XPort shield is not attached, and I get a steady stream of data from the serial monitor in the arduino env.

When I attach the xport shield and restart the board, it cannot detect a serial port from terminal and I get this error in arduino:

Serial port '/dev/tty.usbserial-A6004oD9 not found. Did you select the right one from the Tools > Serial Port menu?

The reason this is happening, I suspect, is because in the console I'm getting these bugs:
Jul 12 22:51:20 semeiotica kernel[0]: FTDIUSBSerialDriver: 0 4036001 start - ok
Jul 12 22:51:55 semeiotica kernel[0]: USBF: 7282.463 [0x328d800] The IOUSBFamily is having trouble enumerating a USB device that has been plugged in. It will keep retrying. (Port 1 of hub @ location: 0x3d000000)
Jul 12 22:51:59 semeiotica kernel[0]: USBF: 7286.303 [0x328d800] The IOUSBFamily was not able to enumerate a device.

...so for whatever reason the usb connection is disappearing when I hook up the shield.

here is what I am running:
arduino decmilia
arduino software v11
adafruit's eshield w/LTRX XPort
FTDI serial driver 2.29
Mac intel OSX 10.4.11
using the botanicals twitter pde v2.13 (not that it should matter)

seems to be a hardware issue even though I've been over the wiring many times...

any ideas?

kind regards,
gabriel

[faludi]

Can you post a picture of the shield and wiring? It would probably be helpful for us to see both sides.

[gharp]

here are some images of the setup.





thanks

[faludi]

Have you tried using an external power supply for the Arduino, instead of getting power off of the USB port?

[gharp]

I did try it with the 9v power supply, as well as just the usb power

[faludi]

Do the lights on the XPort turn on and blink as expected? Can you connect to it using serial or TCP/IP?

[gharp]

I was able to connect and configure the XPort via telnet when I plugged it into my ethernet hub. The link does seem to be active (green light), but no blinking green/amber light on the right side- suggesting that signal isn't going out to comp. Unable to connect currently via serial, as the usb keeps quitting on me. Will try to view serial stream using another terminal..