With serial connections, it very hard to determine if the device is actually connected or not. On most RS232 drivers, it will show as connected even if it's not. You should be able to tell if it can actually communicate with the ADA by changing one of the fields such as the current source or the power field. If nothing happens, then you know you aren't controlling it.
I'm not a 100% sure on your build but com port 1 is usally the port on the motherboard. Then your serial card should start with com3. So com3 should be port1 on the serial card and so on and so forth.
Lastly, on the ADA, make sure that you have the correct switches set on the ISO CAT set otherwise you won't be talking to the ADA. In your case I think it should be switch 1 and switch 3 that should be pressed.
Also, you need to wire everything correctly. The RackServer gets connected to the ISO CAT. The ISO cats plugs in to the WH-2000 using the special wire harness provided with the suite16. The suite16 also plugs into the WH-2000 using the special wire harness.