[help] button isn't "clickable" coz of custom cursor?

I hope this isn’t a silly question! In my game I have a character that is sort of attached to the mouse cursor. I am using the following code
startDrag(“dog”, true, 30, 40, 423, 400);

This works perfectly!! Except that underneath the area that I have locked the “dog” to, is a button that I need to be able to click on during the game. But at the moment you can’t click on that button, as soon as u put your mouse cursor over the button its not “clickable”. Is there a reason it does this? or is there a way to change it so that once the mouse cursor is outside the locked area it becomes an ordinary cursor?

I hope that you understand! I am really confused by this and would appreciate any help. Please. Thanks!