What's saying it's an invalid file name, when you try to load it to the site?Well I almost got it but It said invalid filename. What's a valid filename.
I'm scratching my head too it's hard for me to help when I can't see it.
If it said "invalid file type" I'd understand that but the "filename" thing is the part I don't get.
Try this, go into the file where you have the pic(s) and right click on the pic. A list will appear and left click on "RENAME" and make it something like "Suomi Kit". Then try to upload it again.
Did you try to upload it to the Gallery here? Look at the top of the page and click on the button and set up an album or whatever it's called here. I'm pretty sure you just click on "Upload Photos" and it will either set up a folder or walk you through the set up.