Most permissions are currently incorrect. Reread the installation instructions and set permissions as specified there.
Directory Permissions:
755 = drwxr-xr-x
777 = drwxrwxrwx
File Permissions:
755 = -rwxr-xr-x
777 = -rwxrwxrwx
When setting permissions, do not trust the permissions dialog box and use the DirInfo button to check permissions. The directory listing might need to be refreshed before showing your new permissions.
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mjrand