Paperclip issue " is not recognized by the 'identify' command."

I tried to upload an image an image (paperclip plugin and windows 7) and then i received the following errror
Avatar C:/Users/machine~1/AppData/Local/Temp/stream20101210-2576-p7vfu8-0.png is not recognized by the 'identify' command.

This was the error obtained as i had not installed imagemagick in my new machine. To fix this i download image magick from http://www.imagemagick.org/script/binary-releases.php
Installed it and then restarted my machine.