API for .NET 4.1.5

Respected Sir

i want to download the Tamino API for .NET 4.1.5 for Windows and when i click the btton i accept it gives an error
You are not authorized to view this page
You do not have permission to view this directory or page from the Internet address of your Web browser.

why is that so ? why cant i downlaod please help me in this issue.

We have tried this from machines outside of our network and the downloads appeared to work without error.

We experienced a similar error when attempting to get the ZIP file directly without going through the form.

What browser/platform are you on? Is it possible to try IE on Windows if you are not doing so already?