How to use Indexed Fields??

[drluft]

I have a form that uses a collection of objects (a data transfer object) to display a list of data. One of which is a checkbox. I want to get all the rows back on the submit and loop through them to get the ones that they checked to process them. PROBLEM is I can't get anything on the submit.
Here is the form.

<form-bean name="boRequestListForm" type="org.apache.struts.action.DynaActionForm">
<form-property name="results" type="java.util.Collection"/>
<form-property name="requestType" type="java.lang.String"/>
<form-property name="sortBy" type="java.lang.String"/>
<form-property name="submitParam" type="java.lang.String"/>
<form-property name="requestInd" type="java.lang.String"/>
<form-property name="displayHeading" type="java.lang.String" />
<form-property name="methodToCall" type="java.lang.String" />
<form-property name="approveCBX" type="java.lang.String"/>
</form-bean>

Here is a snippet from the jsp:
<logic:iterate id="list" name="boRequestListForm" property="results" type="com.mercury.maos.data.ApprovalDO">
<tr >
<td><bean:write name="list" property="ticketNo"/></td>
<td><bean:write name="list" property="moduleDesc"/> </td>
<td><bean:write name="list" property="plantDesc"/> </td>
<td><html:checkbox indexed="true" name="list" property="approveCBX"/></td>
<td><bean:write name="list" property="roleName"/> </td>
</tr>
<html:hidden indexed="true" name="list" property="requestInd"/>
</logic:iterate>

On submit, the action doesn't get ANYTHING back. Everything is null. HELP PLEASE? What am I doing wrong???