Admob with ios4 error occurs....... Iphone os4

Question

My code was successfully run into the ios 3.1.3 now i update the sdk to 4.1 and code is not woking i got the error.

Undefined symbols: "_OBJC_CLASS_$_AdMobView", referenced from:

  objc-class-ref-to-AdMobView in supportViewController.o
  objc-class-ref-to-AdMobView in FindViewController.o
  objc-class-ref-to-AdMobView in InformationDetailViewController.o
  objc-class-ref-to-AdMobView in HomeScreenViewController.o
  objc-class-ref-to-AdMobView in DetailViewController.o
  objc-class-ref-to-AdMobView in InformationViewController.o
  objc-class-ref-to-AdMobView in InformationSummaryViewController.o

ld: symbol(s) not found collect2: ld returned 1 exit status

Answer 1

Have you got all the Frameworks in there linked they need?