NSAttributedString kCTParagraphStyleSpecifierParagraphSpacing has no effect

When applying the kCTParagraphStyleSpecifierParagraphSpacing style, it has no visual effect to the rendered text. The other attributes, such as line spacing and text alignment work perfectly. What could I be doing wrong?

CTTextAlignment theAlignment = kCTRightTextAlignment;
CGFloat paragraphSpacingFloat = 150.0;
CGFloat paragraphSpacingBeforeFloat = 150.0;
CGFloat lineSpacing = CTFontGetLeading(baseFont)*5.0;

CFIndex theNumberOfSettings = 4;
CTParagraphStyleSetting theSettings[4] = {
  { kCTParagraphStyleSpecifierParagraphSpacing, sizeof(CGFloat), &paragraphSpacingFloat },
  { kCTParagraphStyleSpecifierParagraphSpacingBefore, sizeof(CGFloat), &paragraphSpacingBeforeFloat },
  { kCTParagraphStyleSpecifierAlignment, sizeof(CTTextAlignment), &theAlignment },
  { kCTParagraphStyleSpecifierLineSpacing, sizeof(CGFloat), &lineSpacing }
};

CTParagraphStyleRef theParagraphRef = CTParagraphStyleCreate(theSettings, theNumberOfSettings);
[attr addAttribute:(id)kCTParagraphStyleAttributeName value:(id)theParagraphRef range:r];
[attr addAttribute:(id)kCTFontAttributeName value:(id)baseFont range:r];
CFRelease(theParagraphRef);

I render the text using

CTFrameSetter frameSetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)attr);
CTFrameRef frame = CTFramesetterCreateFrame(frameSetter, CFRangeMake([[attr string] length], 0), the_drawing_cgrect, NULL);
CTFrameDraw(frame, context);