Hi again Legion.
I'm using V1.4.2 also, but I have replaced my Pride of Rotterdam dynamics with the old file from Version 1.4 of the game. These dynamics are much more responsive, and i've just tried this mission out myself. The ship is out of the dock within seconds.
Not sure if this is a problem with the mission or the slowness of the POR dynamics (shouldn't be THAT slow though!), but i'd reccomend you try these dynamics (I've attached them). Just go to
My Computer > Program Files > vstep > ShipSim2008 > Actors > Objects > Pride of Rotterdam and paste this dynamics file into that folder.
Alternatively, you can download an excellent dynamics file for the POR from the creators forum. You can access and register for that here:
http://www.shipsim.com/ShipSimForum/index.php/topic,12808.0.html (The link to the creators forum is in TerryRussell's signature).
Hope this helps,
Nathan