Connect my site to my database

For some reason my website is no longer loading. Contacted the server host and they said that for some reason my site is not properly connecting to the database. The normal steps to fix this issue ([login to view URL]) but because everything is so customized in your account they couldn't tell exactly where the fail is. They said I have a [login to view URL] file in my public_html, but in that file is a piece of script that seems to direct the file to look for the database connection stuff in the folder config where there's another [login to view URL] file. [login to view URL] Need this fixed.