Problem Downgrading From 1.1.3 to 1.1.1

Hi Everybody, I've got this this problem while trying to do the downgrade from 1.1.3 to 1.1.1 to see it watch the video on youtube

http://www.youtube.com/watch?v=LCk3ERhd0sU

Please i need help to solve this problem. Regards.

rocksheavy.