[Tinyos-help] Help with iris motes!!

[Mohammad Sajjad Hossain]

Hi,I am trying to install the Blink app in an iris mote using an mib520
board. I am issuing the following command:
 make iris install mib510,/dev/tty.usbserial-XBQQV3HRA
Everything goes well expect at the end, I get this:
-------------------
avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.05s

avrdude: Device signature = 0x000000
avrdude: Yikes!  Invalid device signature.
         Double check connections and try again, or use -F to override
         this check.


avrdude done.  Thank you.

make: *** [program] Error 1
--------------------
I am using the most recent version of tinyOS and using mac OSX 10.5.6. Any
idea what might be wrong?
'motelist' generates the following:

Reference  Device                      Description
---------- ---------------------------
---------------------------------------
XBQQV3HRA  /dev/tty.usbserial-XBQQV3HRA (none)
XBQQV3HRB  /dev/tty.usbserial-XBQQV3HRB (none)

Any help will be appreciated.
--sajjad
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