[Plugin: Recent Posts Slider] Images dont't change

Hello,

I’m using the plugin,
All is working except the image it shows,

Always shows the first I had to show,
le me explain,

After publishing a post if I modify the image, it doesn’t change and shos the first image it had to show, even if I delete it,

Any idea,
thanks,
best regards,

http://wordpress.org/extend/plugins/recent-posts-slider/