Unable To Access Admin Page

[Guest innovBio]

I am unable to access admin page, it just gets hung up. Contacted my hosting company and they didnt help only told me this is where the problem was

php index.php

Not Found

The requested URL was not found on this server.

if (file_exists('..'.CC_DS.'admin.php')) { header('location: ../admin.php'); } else { header('HTTP/1.1 404 Not Found');

I have searched forums and cannot find answer.

Please help!

Thank You