I've changed it to administrator and changed other files ccp, trs2006, trainzutil, trainz, ect. And I can not download anything still. I've been taking this problem head on for about 14 hours and am having no luck. I've tried talkin to other that I know on other sites and everyone seems to tell me the same thing and I keep doing the same thing with the same result: Error. Unable to register Trainz URL key. I've even watched videos on youtube and still nothing. This is driving me crazy lol.