Value passing problem from once class to another

Dear All

I am able to assign values to NSarray timeZoneNames defined in RootViewController.m from SimpleTableViewAppDelegate.m and then I can use 'timeZoneNames' inside RootViewController.m perfectly.

But When the same procedure I follow for SubTable.m (where Nsarray timevalue is defined), a null array is assigned in SubTable.m

Codes are :

SimpleTableViewAppDelegate.m

Code:

- (void)applicationDidFinishLaunching:(UIApplication *)application {
	
	RootViewController *rootViewController = [[RootViewController1 alloc] initWithStyle:UITableViewStylePlain];
	window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
	
SubTable *sub = [[SubTable alloc] initWithStyle:UITableViewStylePlain];
NSArray *timeZones = [NSTimeZone knownTimeZoneNames];

rootViewController.timeZoneNames = [timeZones sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
	
	
  NSArray *test_array = [[NSArray alloc] initWithArray:timeZones];
  sub.timevalue = [test_array copy];
	//NSLog(@"count is %d", [sub.timevalue count]);
	
UINavigationController *aNavigationController = [[UINavigationController alloc] initWithRootViewController:rootViewController];
	self.navigationController = aNavigationController;
	[aNavigationController release];
	[rootViewController release];
	[window addSubview:[navigationController view]];
	[window makeKeyAndVisible];
}

RootViewController.h is like:

Code:

@interface RootViewController : UITableViewController {
	NSArray *timeZoneNames;
}

@property (nonatomic, retain) NSArray *timeZoneNames;

@end

And inside RootViewController.m ,

Code:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
	NSLog(@"timezonesname count is %d", [timeZoneNames count]);
	return [timeZoneNames count];
}

In above case, correct value is getting displayed.

While
SUbTable.h looks like:

Code:

@interface SubTable: UITableViewController {
	
	NSArray *timevalue;

}
@property (nonatomic ,retain) NSArray *timevalue;
@end

and Inside SUbTable.m

Code:

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
	NSLog(@"timevalue count is  %d", [timevalue count]);
    return [timevalue count];
}

And here value displayed is always 0.

Where exactly I am making the mistake? What should I do so that timevalue can be assigned in the same way timeZoneNames is assigned.