domain mapping images not showing up

I am setting up wordpress multisite and I am having issues with domain mapping. I just installed your domain mapping plugin hoping it would solve my issue, but it is still happening.

When I upload an image in either of my subsite domains (I am using paths and CNAME to my core domain - i-cweb.com)

I cannot see the image in media manager when I upload an image to a subsite, but the image uploads, I can see that through ftp. Subsites - http://www.thoughtsfloatdown.org - http://www.demonsinus.com

On the site I get a 404 for the image.

Thanks for the help,
Denise