there is no reference number on screen, but it says code 0, How can I reinstall mbox create & give it the correct value?

Hi, my name is George, First let me say I haven't got a clue what I'm doing. second I have a problem. third, I have been playing a gamehouse game for some time now, untill today that is, Now ,for some reason I get an error message,    The value of property 'mboxcreate' is null or undefined, not a fu...