In my Project I have done 90% development using XCode 4.2 (was only need to su
Mangesh, Since you are updating the project to iOS 6, it is normal that your frameworks go missing some times. In order to add them, please go to build phases and then open the tab Link with binaries and add both the missing files as shows in the screen below.
It should help you add the libraries and you are ready to build it. If you are still facing problems, you can also add the Framework search paths (This will be your local path for the frameworks) for the project under the Build settings. And also please make sure that the framework paths are recursive.