Commands are dependent on your application

The commands are dependent on the keyboard shortcuts that are available for your particular application. The entry works in MS Word, so the key is to find what is different in EditScript. If you manually type out the keyboard shortcuts: Shift+Right, Shift+F3, and then Ctrl+Left, do you get the desired result?

You can always use the Capitalize Selection command under Command -->Text in the Add Entry window.
{command}{Shift Right}{Capitalize}_

Kind regards,
Kristen

PS Also, make sure to ask your system administrator to enable the clipboard in EditScript.