The Silverlight software is not supported by Microsoft Edge, Mozilla Firefox and Goggle Chrome browsers.

This is a problem when connecting to a TDX/THD running software 1.x, 2.x or 3.x.

In these software versions, Silverlight is used by the TDX/TDH user interface.

You can download Silverlight here: 

Browsers that support Silverlight:

Microsoft IE (Internet Explorer)

You can download it from here:

Apple Safari (ver. 5.1.4 and 5.1.7) for Windows

You can download it from here: 

Alternatively, you can download Firefox Portable Legacy.

This portable edition can be found here: