sIFR header with inside span

I've got the following situation:

<h2>This text is <span>pretty awesome</span></h2>

I'm trying to give both a different style like this (only the css):

h2 { font-size: 21px; text-transform: uppercase; line-height: 37px; height: 36px; text-align: right; margin-right: 10px; }
h2 span { font-size: 16px; color: #666666; text-transform: lowercase; }

Now just calling this like the following things doenst work and only displays the general H2 style:

sIFR.replace(headache, { selector: 'h2', css: ['.sIFR-root { stylesforh2 } '], wmode: 'transparent' });
sIFR.replace(headache, { selector: 'h2 span', css: ['.sIFR-root { stylesforspan } '], wmode: 'transparent' });

neither does this work:

sIFR.replace(headache, { selector: 'h2', css: ['.sIFR-root { stylesforh2 }, span { stylesforspan} '], wmode: 'transparent' });

I'm a sIFR firsttimer and I'm problably doing something silly wrong, but I cant figu开发者_运维技巧re it out. Can someone tell me how its done properly?

Using sIFRT version 3, revision 436.

Tnx in advance

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Aparently it just wont work with span. Got it to with with em