I was working on one of my pages and I got a nice gallery going and uploaded my images just fine. I am putting up another gallery on a separate page and suddenly I can't upload anything. I've tried changing the files to JPEG, GIF, TIF, and nothing will work. I tried making them smaller. I tried changing the names. Nothing. I keep getting the same message 'Error 500 Internal Server Error' and it tells me to try again later. But I've been trying to get this to work since last night. I'm very new to wordpress and building sites, so I really need basic instructions.