I had the exact same problem. Look at http://www.opsou.com/blog/2010/01/15/error-500-en-wp-admin/. I changed the access to those folder as they say and it worked.
I had the exact same problem. Look at http://www.opsou.com/blog/2010/01/15/error-500-en-wp-admin/. I changed the access to those folder as they say and it worked.
