Validation Bypassed

[Cory D. Wiles]

I am having trouble outputting my validation error messages.  I know that
the validation is being fired off, but the actionmessages/errors aren't
being displayed.

Validator File:

<!DOCTYPE validators PUBLIC
        "-//OpenSymphony Group//XWork Validator 1.0.2//EN"
        "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd";>

<validators>
    <field name="screenone.screenOneProtocolNumber">
        <field-validator type="requiredstring">
            <message>This is my message</message>
        </field-validator>
    </field>

    <field name="screenone.screenOnePrincipalInvestigator">
        <field-validator type="requiredstring">
           <message>This is my message</message>
        </field-validator>
    </field>
</validators>


form.jsp snippet:
    Errors: <s:actionerror/><br/>
    Messages: <s:actionmessage/>

<s:textfield name="screenone.screenOneProtocolNumber"
id="screenOneProtocolNumber" label="%{getText('
arc.screen.one.section.one.first.input.label')}" size="10"><s:property
value="screenone.screenOneProtocolNumber"/></s:textfield>
      <s:textfield name="screenone.screenOnePrincipalInvestigator"
id="screenOnePrincipalInvestigator" label="%{getText('
arc.screen.one.section.one.second.input.label')}"><s:property value="
screenone.screenOneProtocolNumber"/></s:textfield>