I have a brand new server which is running Windows NT D00110997E0B6 5.2 build 3790 with Plesk 7 in a standard setup. I have created an account and am trying to get the latest version of vBulletin set up. However, whenever I go to the install page, I get this PHP error:

Code:
Warning: chdir(): No such file or directory (errno 2) in C:\Inetpub\vhosts\example.com\httpdocs\install\install.php on line 17
 
Warning: main(./install/installcore.php): failed to open stream: No such file or directory in C:\Inetpub\vhosts\example.com\httpdocs\install\install.php on line 69
 
Fatal error: main(): Failed opening required './install/installcore.php' (include_path='.;./includes;./pear') in C:\Inetpub\vhosts\example.com\httpdocs\install\install.php on line 69
But the files are there. Any suggestions as to why I get this? This only seems to happen on the Windows server that is being used.