My button is dead forever even though the interactable is checked. Bug in Unity?

The button is just frozen and I think its because of a function I attached to the script but what even when I reset the Button component on that button it is still frozen. I am calling it frozen because unlike other buttons it is not dimming when I click and hold on it and also it is not working even though I attach a good working function to the OnClick event. It is still dead and the only round about is delete the button and recreate it ,but again when I attach the previously told function and run it again it works once but the next time (sometimes it is working for a couple of times),it is dead again and forever no matter what ever I reset in that button.

I actually think this is a bug in unity... please confirm.

And ya the code is here...

 public void SaveState()
     {
         newGame.GetComponent<Canvas> ().enabled = !newGameState;
         newGameState = !newGameState;
         characterCreation.GetComponent<Canvas> ().enabled = !characterCreationState;
         characterCreationState = !characterCreationState;
         headCust.GetComponent<Canvas> ().enabled = !headCustState;
         headCustState = !headCustState;
         hairCust.GetComponent<Canvas> ().enabled = !hairCustState;
         hairCustState = !hairCustState;
         eyesCust.GetComponent<Canvas> ().enabled = !eyesCustState;
         eyesCustState = !eyesCustState;
         nextAndBackBtn.GetComponent<Canvas> ().enabled = !nextAndBackBtnState;
         nextAndBackBtnState = !nextAndBackBtnState;
     }

Savestate is the function I attached to the button.

newGame,characterCreation,headCust,hairCust,eyesCust,nextAndBackBtn are all just canvases which I am enabling and disabling the canvas component(this method is working for other buttons which I have coded in a same way)

I am using unity4.6 not the beta but the stable version.