I just started making an app and it is the HelloWorld App. When i go to open the ViewController.XIB folder i get and error message when it goes to open the interface builder program. I get this error message (Interface Builder is unable to open documents of type CocoaTouch XIB) and then in smaller print it says (Ensure plugin for the CocoaTouch XIB document type, from the corresponding SDK, is installed). I am new to the world of macs and do not quite understand this, please help me.
