Are you using external USB hub to connect your board?

I got a similar error when I tried to connect it through external USB hub.

On Mon, Jan 14, 2013 at 9:22 AM, Srinath M <> wrote:

I have a Gumstix overo sandstorm that i have attached to a Tobi expansion board.
Have connected a usb cable to the  'usb-serial port' shown in the video.

I tried connecting with kermit
srinath@ubuntu:~$ kermit -l /dev/ttyUSB0
can't open device

Tried with ttyUSB1/2/3 etc. Nothing works

Haven't powered up the board yet, as mentioned in this site.

What am i missing?

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