The JTAGICE-mkII debugger version 4.10B doesn´t work together with the AVR JTAGICE-mkII emulator if the firmware is updated with AVR Studio 4.11 Service Pack 2.
Download update
The update corrects this problem. Use the link to the right to download it. The installation instructions will be found in the zip archive.
Direct link to this page:
http://www.iar.com/Support?note=60448