Php error for transfer

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?

It seems straight forward - you do not have the wp-blog-header.php file in the correct place!

I do not use wordpress but I would have thought you need to install it and not just copy it from one sever to another. I would try installing a fresh version of wordpress and see if that works; you could probably then overwrite the site with your old files as long as it is the same version.

I can be done that way but I have done a complete back up of the wordpress and the database. I have imported the data base and all the wordpress files included. It should be working at this point for me to go ahead and replace urls etc but this error should no be there