NSUserDefaults not working when opening a nib programmatically

In the window which shows up at launch and NSUserDefaults works great with the initial window. If i open the same nib file again programmatically with this code:

NSWindowController *controller = [[NSWindowController alloc] initWithWindowNibName:@"MainMenu"];
[controller showWindow:self];

it fails to get the NSUserDefaults. I get the value of (null). I read the defaults like this:

[[NSUserDefaults standardUserDefaults] valueForKe开发者_开发知识库y:@"myKey"];

and write to them like this:

[[NSUserDefaults standardUserDefaults] setValue:@"myValue" forKey:@"myKey"];

What am I doing wrong? Once the value is set and I relaunch the application, reopen the prog. loaded nib window it fails!

I open this programmatically opened window from the class which the NIB file is hooked up to -> The user presses a button and the 2nd window opens!

I found the problem myself now. I had a NSUserDefaults variable defined in the .h so i can access it on the whole .m file. I was initializing it, mainDefaults = [NSUserDefaults standardUserDefaults], in the - (void)applicationDidFinishLaunching:(NSNotification *)aNotification{}, which was only called when the application started! When I opened a new window, that wasn't called of course!

Anyway, thanks for your help.