Hi

I backed up and saved all my data from a site. Extracted it all the the transfered all those files onto the new site ( root directory )
All should be working fine but I have this error:


Warning: require(./wp-blog-header.php) [function.require]: failed to open stream: No such file or directory in /home/muscom/public_html/index.php on line 17

Warning: require(./wp-blog-header.php) [function.require]: failed to open stream: No such file or directory in /home/muscom/public_html/index.php on line 17

Fatal error: require() [function.require]: Failed opening required './wp-blog-header.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/muscom/public_html/index.php on line 17

What's the problem here and how can I fix it?