Don't ever, ever change the passkey. Your brick will be unusable at a competition. Reset it back to "1234" using the ROBOTC "Reset Password" branch on the bluetooth menu.
Try connecting the NXT to the laptop using the Add bluetooth devices in windows. Also, read all the Bluetooth documents located on the FIRST website (
http://www.usfirst.org/community/ftc...aspx?id=11126).
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Mannie Lowe
FIRST Program Manager - Center for Mathematics and Science Education - University of Mississippi
Mississippi
FIRST Tech Challenge Affiliate Partner
