Why the LED on AVR-JTAG-D extinguish ?

I use the AVR-IO-M16 board with the Olimex AVR-JTAG PGM-00011. when I apply power the LED on board and ITAG light up. After choosing Build and Run the JTAG LED extinguish and a message ‘Could not connect to JTAG ICE com1’ appears. This is my first try and it is frustrating. Can somebody help ?