Help with Embedding {exp:channel:entries} inside a query

I’m trying to use exp:query and having trouble embedding {exp:channel:entries} tag within it.

The goal of my code: - Pull a custom member field from the URL ({segment_3}) - Use {exp:query} to look at that custom field in the URL and find the user’s group_id - If the group_id matches, then display the contents of {exp:channel:entries}

What’s working: - I can get the query to recognize the custom field, and to grant permission based on group_id, and display anything NOT within the {exp:channel:entries}

What’s broken: - Once we’ve validated group_id, I cannot get it to display the contents of {exp:channel:entries}

Interesting Note: I am using a custom field in the query ({segment_3}). If I changed this to a built-in field, like username, then the {exp:channel:entries} data displays just fine.

The broken code:

{exp:query sql="
SELECT m_field_id_3, group_id, a.member_id
FROM exp_member_data a
JOIN exp_members b 
ON a.member_id=b.member_id
WHERE m_field_id_3='{segment_3}'
"}

{if group_id=='8'}

{exp:channel:entries channel='audio' category='219|220|259' rdf='off' limit='44' start_on='2012-09-01 12:00 am' show_future_entries='yes' show_expired='no' } 
{title}<br>
{/exp:channel:entries}

<item>
<title>{exp:xml_encode}TEST HEADLINE{/exp:xml_encode}</title>
<description>{exp:xml_encode}THIS IS A TEST ITEM THAT IS NOT CONTAINED INSIDE EXP:CHANNEL:ENTRIES {/exp:xml_encode}</description>
 </item>

{/if} 

{/exp:query}

Any idea?