USB-UIRT working, but not with applications

Hi,
I installed my usb-uirt today along with the latest version of girder (4, but trial version).
I followed the user guide for everthing that comes next.
I could configure my remote control(s) without any problem.
But when I intend to use it, nothing happens...almost: the Windows applications like "master mute", "master volume up/down" work.
But for example, I wanted to use the arrows under internet explorer (arrow up and arrow down should scroll the page up or down). When I do that nothing happens. I tried to use the same arrows (from the remote control) but assigned to the mouse directions, and it works perfectly.
I also tried to use the remote control with windows media player, and none of the play/stop/pause... buttons work.
I feel like girder doesn't want to control my applications. Could it come from the fact that I use the trial version or did I forget to do something?
thank you for your help.
I installed my usb-uirt today along with the latest version of girder (4, but trial version).
I followed the user guide for everthing that comes next.
I could configure my remote control(s) without any problem.
But when I intend to use it, nothing happens...almost: the Windows applications like "master mute", "master volume up/down" work.
But for example, I wanted to use the arrows under internet explorer (arrow up and arrow down should scroll the page up or down). When I do that nothing happens. I tried to use the same arrows (from the remote control) but assigned to the mouse directions, and it works perfectly.
I also tried to use the remote control with windows media player, and none of the play/stop/pause... buttons work.
I feel like girder doesn't want to control my applications. Could it come from the fact that I use the trial version or did I forget to do something?
thank you for your help.