Rugged Desk Dock not working

Do you have an AC adapter plugged into the dock?  If so, what is the wattage of that adapter?  I believe the dock requires at least a 130W adapter when used with a Latitude 54xx system, and the system of course draws its own power through the dock when it's connected, no need to connect an AC adapter directly to the system as well.

If that doesn't solve it, there aren't any drivers for that type of dock, same as the regular E-Port docks, because all of the actual electronics to drive the dock connectors is built into the system itself. All of the pins from those various devices come out at the dock connector, and the dock itself basically just extends all of those pin connectors from the system out to the various ports built into the dock, which is why there are so many pins in that connector to begin with.  There aren't any chips or anything in that dock like there are in the D3100/WD15/TB16, for example, except maybe a USB hub that Windows would support natively.  However, that of course means the dock should be plug and play, and if the AC adapter suggestion above doesn't resolve the issue, it sounds like you may have a hardware issue with either the docking connector on the system or the dock itself.