KeyStroke Tied to Function

I'm having an issue with a function tied to a keystroke.

I have declared in my config.js file the following keystrokes:

config.keystrokes = [
      /**
       * Shortcuts for Shifts
       */
         [ 83 /*S*/, 'cellFillStore' ],
         [ 70 /*F*/, 'cellFillRegister' ],
         [ 79 /*O*/, 'cellFillOffice' ],
         [ 84 /*T*/, 'cellFillTechStore' ],
         [ 90 /*Z*/, 'cellFillEmergency' ],
         [ 80 /*P*/, 'cellFillPhone' ],
         [ 87 /*W*/, 'cellFillWhite' ],
         [ CKEDITOR.CTRL + 79 /*O*/, 'cellFillOrange' ]
   ];

Each command has three parameters: the selection, a cell bgcolor, and text to put into the cell.

Here is the function that is ultimately called:

   function backgroundColor( selectionOrCell, color, code)
   {
      if ( selectionOrCell instanceof CKEDITOR.dom.selection )
      {
         var cellsToChange = getSelectedCells( selectionOrCell );
         for ( var i = cellsToChange.length - 1 ; i >= 0 ; i-- ) {
            cellsToChange[i].setAttribute( 'bgColor', color );
            cellsToChange[i].innerHTML = code;
         }
      }
      else
      {
         selectionOrCell.setAttribute( 'bgColor', color );
         selectionOrCell.innerHTML = code;
      }
   }

The bgcolor changes fine but I cannot get the HTML portion to work. The cell just remains empty. Any help would be appreciated.