fust things furst were did u get the game?
also did you buy both ship sim 08 and nh at the same time?
when entaring you key is it in caps?
are you puting in the corect key?
next try this it my hellp to to resolve the corect key you manuel may be the rong one for the box http://www.shipsim.com/ShipSimForum/index.php/topic,2097.0.html
after that drop wout a pm he may be abol to shed some more light on the topic
Chris S