[ic] Coordinated Search Problem

[Mathew Jones]

Based on a previous mailing list response by Mike to a similar question
regarding coordinated searches, I tried this code below.
If only a category value is submitted the returned result are matched
from all fields in DB not just category fields.
Am I  missing something simple?
Maybe you have a suggestion Mike?

Thanks

Mat

<input type=hidden name="st" value="sql">
<input type=hidden name="co" value="1">

<input type=hidden name="sf" value="author">
<input type=text name="se" value="">
<input type=hidden name="sf" value="title">
<input type=text name="se" value="">
<input type=hidden name="sf" value=":category1:category2:category3">
<select name="se">
<option>Art
<option>Fiction
</select>