Get SQL database values

We're currently developing a new site for a client - a Church. We're building the whole project on a Wordpress platform, and using the Sermon Browser plugin to manage their audio files.

The church has multiple versions of each sermon recorded (it's preached to three congregations every Sunday) and I need to colour code the output.

I've added a 'congregation_id' column to the table of uploaded files, and set the upload form to set each file to have a congregation value of 1,2,3 or 4.

In the function that presents the sermon recordings, I need to extract the congregation_id of the file from the files table, and output it as a variable, so we can set it as a class and style each version differently.

In the attached screenshot on line 662, you'll see I've tried setting the value of $congregation_id using a REQUEST function, which doesn't work. I need a couple of lines of code that will extract the congregation value from the table (called sb_stuff) and tie it to a variable for the file.