How can you correctly install a LK-450 expanded keyboard in Windows S2003?

Hi, I have been asked to connect an LK450 expanded ps/2 keyboard to our Windows server 2003 machine.
It connects through a ps/2 to USB converter and then a USB KVMX expander as the PC has no PS/2 ports.

The problem is that not all the keys seem to be mapped, in particular the F16/F17 keys. This leads me to believe it is a
driver problem.

I was wondering if anyone else has encountered this problem and if so how did they solve it?