Redirect 404 error

I have a 404 error. I created a redirect for the page, but 7 hours later, I’m still getting the 404 error. Here is page I am trying to redirect: http://newsite.southmountaintitle.com/real-estate-sales/. I’ve redirected it to http://southmountaintitle.com/real-estate-sales.
When I first launched the site, I had set up many redirects and they are all working great.
Any help would be appreciated.

Thanks.

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