Hello!

I am new to Umbraco, so I'm probably not doing something correctly, but I cannot for the life of me figure out what.  So I'm porting an existing website over to Umbraco, page-by-page. When I upload the images from the site into then Media folder (and sub-sequent created subfolders),  it will sometimes save them, sometimes not.  I will log out of Admin and WebMatrix, reload them, and the file structure will have reverted to what it was before any files were added.  It has also done this (deleted them randomly) when I added new subfolders.

If I go into the actual site files, I can still find all of the images there, but as they are not showing in the admin panel, it does me no good.  What am I doing wrong? Do I need to save something after making the uploads?

Thanks for the help!