I have CSS to hide a table label in my form; however, I'm sure I have done something wrong, since it isn't actually hiding the label at all!  Here is my CSS:

.hidetbllbl .cf-section-header h1 {display: none;}

I have hidetbllbl set as the class for this particular table, but the label is still showing up like I have no CSS targeting it at all.  I have two tables on the form, but this is the only one where I want to hide the label.  Any clues as to what I am missing?

Thanks in advance for any help you can provide!