I don't know why but I've never gotten RomeShell to work? I'm trying to use the force diplomacy command but it won't work! Here's exactly what I do...

Step 1- Press ` to open RomeShell

Step 2- Window opens and I type "force_diplomacy <accept/decline/off>"

Step 3- I hit enter and get "err- command not recognised!

WTF am I doing wrong?