It doesn't look like a valid <select> is being created:
<select name="os0"><OPTION value=""></OPTION><OPTION value=""></OPTION><OPTION value=""></OPTION><OPTION value=""></OPTION></select>
I'm not sure what the correct PHP is but it needs to create something like:
<input type="hidden" name="on0" value="Scent">
<select name="os0">
<OPTION value="Vanilla">Vanilla</OPTION>
<OPTION value="Lemon">Lemon</OPTION>
</select>
Maybe it's not fetching anything from your DB?
Patrick Breitenbach
PayPal, Inc.
Dev Net:
https://www.paypal.com/pdn