All-in-one cufon plugin change font size

I’m having a hard time adjusting the font-size using the All-In-One Cufon plugin. I’ve tried:
Cufon.replace(‘h2′, {font-size: ’30px’});
and nothing changes. The font stays at the original h2 font-family and size.
When I try this code:
Cufon.replace(‘h2′, {fontsize: ’30px’});
the font-family changes to the cufon-assigned font, but the font-size does not change.
Trying to change the font on the entry-title on this website:
https://www.frankmembreno.com/blog/
Thanks.