projectstowork1:
Thanks for your reply. But we have a slightly different Uno board.My reset button is beside the USB port.
So are those 3 pins GND?
You have the Rev3 Uno board. http://arduino.cc/en/Main/ArduinoBoardUno
Those six pins (2x3) are the ICSP pins associated with the 16U2 AVR chip used to perform the basic USB serial converter function for the board. The pins are used if it's ever necessary to re-burn the firmware that the chip uses.
Lefty