Fatal Error

Fatal error: main() [function.require]: Failed opening required './wp-blog-header.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/crazynla/public_html/wp-content/plugins/index.php on line 4

this is located on the dashboard of my installation. I made sure all files were in the correct folders and such and they are

Edit: Its got to be a cache issue cause I cleared my cache and the dashboard was displayed