setting the "selected" value of combo

Hello,

I am rendering the xml from server side and I want to know how can i set the selected value in xml.
For example take a look on following xml,

<cell xmlcontent="2">
<option value="MotorolaXoom_32GB_N" selected="1">MotorolaXoom_32GB_N</option>
<option value="MotoXoom_Ref">MotoXoom_Ref</option>
<option value="MotoXoom_N">MotoXoom_N</option>
</cell>

This is xml from server side and I want that when it display in combo the selected value should be “MotorolaXoom_32GB_N”. Rite now I am trying with selected=“1” but its not working.

Thanks in advance