Cannot download code in 3pi

I installed the atmelStudio 6.2 and opened the demo program of 3pi with atmel328 and selected the target port(mine is com4) build the file(it was ok) but when i tried to download it said: Could not establish communication with the tool.
The pololu AVR is blinking orange and the pololu 3pi is on. What should i do?


The AVR programmers should install 2 different COM ports. Could you post a screenshot of your Windows Device Manager with the “Ports (COM & LPT)” section expanded to ensure that COM4 is the programming port and not the TTL serial port? Have you followed the steps in the Pololu AVR Programming Quick Start Guide?