I'm having problems with this mission too, its annoying and i don't wanna use cheats. So... every time i restart the mission i get different code but it doesn't work, I enter a code and press enter but it doesn't work. Every time i get that sign with a dot on top of it, if you look at the numpad it's the one the left of 0 (dot). Well i don't really think that's a number at all, cause if you start from the beginning of the numpad there are numbers 1,2....9 and 0, 0 is a dot, sign right of 0 is "enter" but what is the sign left of 0??? The one that you marked with 4, is that like a backspace or something? I think the problem is with that sign, if you get it in the code the code won't work and i get it every time i restart the dam mission...