Can't get monitor to work on ThinClient T620 Plus

Hi all;

I've got a HP ThinClient 620plus that I'm trying to fire up but the monitor gets "no signal" when using the AMD FirePro 2270 Graphics Card DMS-59 and the supplied DVI-i via DMS-59 cable.My monitor has both DVI-D input and a 15-pin f/male connector

The monitor and cable works fine with my desktop in both DVI and 15-pin input

I wanted to try connecting the 9-pin male serial port to the monitor 15-pin but I can't find a 9-pin f/male to 15-pin male cable or a 9-pin female to 15-pin f/male gender converter so I could use my existing cables.

So, what do people use to connect this thinclient to monitors? Or better still, what should I be using?

Thanks, Norm