Media webpage extremely sluggish

Hi,
I have this plugin installed along with CW Image Optimizer. This plugin makes my media WP site extremely sluggish. When I add a new image to a post it takes about 15-20 minutes and WP warns me every minute or so that scripts on my site are slow and whether I want to wait or interrupt them.
Disabling Media WP solves all the issues with the media site – I can browse and add images very quickly.