Song from "Skeleton Key"

What's that song that plays in the trailer, that old blues song? I've tried looking for it but my search came to no avail, anybody know how to help me?

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Remember, remember, the 5th of November
I'm afraid I must bid you adieu.
He woke up one night with a terrible fright
And found he was eating his shoe.

They might have made it specifically for the film. Usually I can find those things relatively fast and I couldn't.

It's actually a prayer rather than a song:

"It is time, Lord.
From the Devil's House you take me
out of darkness....."

Voodoo prayers are basically chants done to drum music.
Whether it's from a real record or created for the movie, I don't know.