Spanish Programmatic Course materials inaccessible

When I try to access these materials I get the following error message:
403 - Permission Denied
You do not have permission to retrieve the URL or link you requested, /Courses/Spanish/Programmatic/Volume 1/FSI - Spanish Programmatic Course - Volume 1 - Student Text.pdf
Please inform the administrator of the referring page, http://fsi-language-courses.org/Content ... ge=Spanish Programmatic if you think this was a mistake.
Are the materials no longer available, or is this a temporary glitch?
403 - Permission Denied
You do not have permission to retrieve the URL or link you requested, /Courses/Spanish/Programmatic/Volume 1/FSI - Spanish Programmatic Course - Volume 1 - Student Text.pdf
Please inform the administrator of the referring page, http://fsi-language-courses.org/Content ... ge=Spanish Programmatic if you think this was a mistake.
Are the materials no longer available, or is this a temporary glitch?