image path

I've got a site that I just ported from a local environment to a remote testing server. Everything is working fine except that an image that I put in a block does not show up! I have checked the path; all seems correct, and the permissions on that folder are 755 and 777 for the image itself.

The only way this site is different from others I am working on is that it is set up as a multisite.

I have my path set up as "sites/domain.com/files/image.png" (where it is), with all spelled correctly.