[Plugin: under construction] image/edit won't update

I am trying to update an image on my ‘under construction’ plugin with no luck. I’ve uploaded the file to the media library, copied the url and posted it in the place of the previous image (in the html). I also tried a minor edit in the text to see if it was just an image problem, and none of the changes show up on the normal ‘UC’ page. Any ideas?

Thanks for your help!

-CP