1980s Voodoo horror title?
 

Around 1984 I saw a low budget, b/w horror film set in a decaying mansion in Louisiana. I remember thinking it was just going to be stupid until it actually started terrifying my friends and I. I have tried to recall this movie in the past few years but with no luck. Anybody have any idea what movie this might be?

Thanks!

found it
 

First, sorry for posting this in the wrong section. Appreciate your help.

I think I've tracked down the movie I'm looking for. In another forum somebody suggested Lucio Fulci's 'The Beyond' and that sounds like the one. I think it was released in the us as something like The 7 Gates of Hell or something.

Thanks!