Relations Proxy Header Edit

[amycatesch]

I have a relations proxy with the header text: "Dumb Header." I want to change this header text. I thought I knew how, but apparently I need some help getting it done.

I opened the Stylesheet Editor, selected MadCap | RelationshipsHeading, and then under "Properties," I changed the mc-label from "Dumb Header" to "See Also:" I saved all my files, doublechecked that I am indeed using this Styles.css with the target I'm working on, and then viewed the target. Thud. My relations proxy is still titled Dumb Header. What am I doing wrong?