Notes for using the LabVIEW Remote Front Panel Plugins for Windows.

You must use the plugin that corresponds with the version of the LabVIEW Run-Time Engine that you are using, for example
the Remote Front Panel plugin for LabVIEW Run-Time Engine 7.0 is not compatible with LabVIEW Run-Time Engine 7.1.

The file LVActiveXControl.dll is for Internet Explorer for LabVIEW Run-Time Engine 6.1
The file LV7ActiveXControl.dll is for Internet Explorer for LabVIEW Run-Time Engine 7.0
The file LV71ActiveXControl.dll is for Internet Explorer for LabVIEW Run-Time Engine 7.1
The file NPLVWin32.dll is for Netscape, Mozilla, and Firefox for LabVIEW Run-Time Engine 6.1
The file NPLV7Win32.dll is for Netscape, Mozilla, and Firefox for LabVIEW Run-Time Engine 7.0
The file NPLV71Win32.dll is for Netscape, Mozilla, and Firefox for LabVIEW Run-Time Engine 7.1

Copy the appropriate plugin to your browser’s plugins directory, typically something like
C:\Program Files\Internet Explorer\PLUGINS or C:\Program Files\Mozilla Firefox\plugins

How to check which runtime you need.