Untitled game before my game

I'm changing my game from 1.1.3 to last 1.5 and there is a weird thing happening to me:

I run the game and it runs ok, except that before load my first level it loads an untitledGame level and I ca'nt figure why is this happening. I have tried to find where is this "empty" level be called, but can't find. Somebody is having this problem and has a solution?

Thanks