iOS IApplication may not respond to '+mainWindow'

#import "cookieTestAppDelegate.h"

@implementation cookieTestAppDelegate

@synthesize window;


#pragma mark -
#pragma mark Application lifecycle

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
    
    // Override point for customization after application launch.
	//NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];
	//NSString *MessageString = [ud stringForKey:"PSTextFieldSpecifier"];
	//construct the web service url
	//sets from the setting entry
	
	NSString *startURL = (@"http://myiplinkhere/?func=******");
	
	NSURL *url = [NSURL URLWithString:startURL];
	
	//create a request object with that url
	NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:30];
	
	//clear out the exisiting connection if there is on
	if (connectionInProgress) {
		[connectionInProgress cancel];
		[connectionInProgress release];
	}
	
	//Instantiate the object to hold all incoming data
	[cookieData release];
	cookieData = [[NSMutableData alloc]init];
	
	
	
	//create and initiate the connection - non-blocking
	connectionInProgress = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];
	
    
    [self.window makeKeyAndVisible];
    
    return YES;
}



- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
	[cookieData appendData:data];
	
	
}





- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
	//we are just checking to make sure we are getting the SML
	NSString *cookieCheck = [[[NSString alloc] initWithData:cookieData encoding:NSUTF8StringEncoding] autorelease];
	NSLog(@"yum yum feed me more cookie!! %@",cookieCheck);
}





- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
	[connectionInProgress release];
	connectionInProgress = nil;
	
	[cookieData release];
	cookieData = nil;
	
	NSString *errorString = [NSString stringWithFormat:@"Fetch failed: %@", [error localizedDescription]];
	UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:errorString delegate:nil cancelButtonTitle:@"OK" destructiveButtonTitle:nil otherButtonTitles:nil];
	[actionSheet showInView:[UIApplication mainWindow]];[B][COLOR="Red"] //UIApplication may not respond to '+mainWindow'[/COLOR][/B]
	[actionSheet autorelease];
}


//***** other code till end.
@end

[actionSheet showInView:[UIApplication mainWindow]]

[actionSheet showInView:self.window];