Monotouch iPhone Dev error when trying to make any action on an Interface Builder Defined Object using the iPhone Simulator

I get The following error on runtime

2011-06-08 14:11:04.712 app[8329:207] -[__NSCFSet BridgeSelector]: unrecognized selector sent to instance 0x875c350

Unhandled Exception: MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown. Name: NSInvalidArgumentException Reason: -[__NSCFSet BridgeSelector]: unrecognized selector sent to instance 0x875c350 at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) at MonoTouch.UIKit.UIApplication.Main (System.S开发者_开发技巧tring[] args, System.String principalClassName, System.String delegateClassName) [0x00038] in /Users/plasma/Source/iphone/monotouch/UIKit/UIApplication.cs:26 at MonoTouch.UIKit.UIApplication.Main (System.String[] args) [0x00000] in /Users/plasma/Source/iphone/monotouch/UIKit/UIApplication.cs:31 at app.Application.Main (System.String[] args) [0x00000] in /Users/ab/Projects/app/app/Main.cs:19

The error occurs when I am trying to make an action on a button defined at Interface Builder.

I use MonoDevelop 2.4.2, Mono 2.10.1, and iPhone Simulator 4.1.. The error happens only by using the simulator..

Thanks in advance.