I am looking for a movie but i don't know the name or the actors?!

it is a horror movie and there are two brothers left home alone!. the little one is afraid of the dark and they both see the things in the dark and those things are the things they are afraid of!. at the end a girl comes in their house to help them!. and i thing that the name of one of the actors is zak or zack!.Www@Enter-QA@Com

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