iOS Question Raising Synchronous Events

Hello,

I have read on the subject in the forum but cannot find a decisive answer to my problem.
My KeyboardStateChanged is raising an unexpected event:

Unexpected event (missing RaisesSynchronousEvents): eyopto_keyboardstatechanged:

I figured i need to set the method to tell the compiler that it is a normal occurance?

Any idea how i can do so? probably by using attributes? if so where?

Thank You

Y.