wp-login not found

I was using my blog just fine. All was going well. Then I installed a new theme, set it up. It was still running fine at first. Then when I returned to my computer, the theme was gone. Not just the new one. There is now no theme at all. I tried to log in to see if I could fix it and I am now unable to log in. I get an error saying the wp-login.php is not found on the server. I downloaded the files again from ww.wp.xz.cn and originally just uploaded the new login.php file. No go. So, I uploaded the entires folder of files. Still no go. I searched around, found the link to the emergency fixer thing and ran that. It says that my log in is not correct, even though I’m copying directly from the file where I changed the user name and password. Someone please help! Below is the site where I’m having trouble. Thanks.

http://www.blog.stacyrainerphotography.com