how to fix Problem with FCAlertView In a ios tweak

Hello every one Im making my first tweak in Facebook App to do a simple tasks But im trying to use FCAlertView alert in my project I used this code to view the alert in facebook main page

#import <UIKit/UIKit.h>
#import <CoreGraphics/CoreGraphics.h>
#import "FCAlertView.h" 
#import <MessageUI/MessageUI.h>
%hook FBBaseAppDelegate
- (void)applicationDidBecomeActive:(id)arg1 {
        FCAlertView *alert = [[FCAlertView alloc] init];
       [alert showAlertWithTitle:@“Test Alert"
              withSubtitle:@"This is alert's subtitle."
       withDoneButtonT itle:nil

But there is an error

“ undefined symbol: OBJC_CLASS$_FCAlertview"

Im using xcode ( alone monkey ) to make a tweak