Need Help Finding Horror Flick
 

Hey guys, I am having a little party tommorow and I need help finding a horror film, that i need to rent.

Okay, probably made in the 1970's or early 1980's, um there is a babysitter and she is in a house, and the telephone rings and she heres a voice, "CHECK ON THE CHILDREN", and so she starts running for the door to get out of the house, and something starts coming down the stairs.
and i saw a TV Program with these guys talking about how the movie was ahead of its time because the house had 2 phone lines, because the bad guy was calling from upstairs aparently and she answered the phone on the floor below.

So please if anyone can give me the title of this movie I would greatly apreciate it. Thank you!!!!!!!!:cool:

The movie is When a Stranger Calls

http://www.imdb.com/title/tt0080130/

THANK YOU VERY MUCH

bye