p:inputText can't set value - jsf

Question

I can't set value into policyCriteria. When I click the Search commandButton, the value in <p:inputText> doesn't set to the poliyCriteria.
I already tried with process="#this" , gave commandButton ajax="false".
Here's my XHTML code.
<table width="100%">
<tr>
<td colspan="3">
<h:outputText styleClass="table-title" value="Life Policy Endorsement Management" />
<p:separator style="height:5px" />
</td>
</tr>
<tr>
<td>
<h:outputText value="" />
</td>
<td>
<p:message for="selectPolicyCriteria" id="lifePolicyMsgSelect" />
</td>
<td>
<p:message for="policyCriteria" id="lifePolicyMsg" />
</td>
</tr>
<tr>
<td style="font-weight: bold;" width="130px;">
<h:outputText value="Select Policy Number: " />
</td>
<td width="120px;">
<p:selectOneMenu converter="omnifaces.SelectItemsIndexConverter" id="selectPolicyCriteria" value="#{LifePolicyEndorsementActionBean.policyCriteria.policyCriteria}">
<f:selectItem itemLabel="Select Criteria" />
<f:selectItems value="#{LifePolicyEndorsementActionBean.policyCriteria.policyCriteriaItemList}" />
</p:selectOneMenu>
</td>
<td>
<p:inputText id="policyCriteria" style="height:20px;width: 200px;" value="#{MotorPolicyEndorsementActionBean.policyCriteria.criteriaValue}" />
</td>
</tr>
<tr>
<td colspan="2">
<h:panelGrid cellpadding="5" columns="2">
<p:commandButton action="#{LifePolicyEndorsementActionBean.search()}" id="searchBtn" update="lifePolicyTablePanel lifePolicyMsg lifePolicyMsgSelect" value="Search"/>
<p:commandButton action="#{LifePolicyEndorsementActionBean.reset()}" id="resetBtn" update="LifePolicyEndorsementForm" value="Reset"/>
</h:panelGrid>
</td>
</tr>
</table>
Here's backingBean
public void search() {
if (inputCheck(policyCriteria)) {
lifePolicyList = lifePolicyService.findLifePolicyByPolicyCriteria(policyCriteria, 30);
}
}
public void reset() {
policyCriteria.setCriteriaValue(null);
policyCriteria.setPolicyCriteria(null);
lifePolicyList.clear();
}
private boolean inputCheck(PolicyCriteria policyCriteria) {
boolean result = true;
String formId = "LifePolicyEndorsementForm";
if ((policyCriteria.getPolicyCriteria() == null) || (policyCriteria.getPolicyCriteria().toString().equals("Select"))) {
addErrorMessage(formId + ":selectPolicyCriteria", MessageId.PLEASE_SELECT_POLICY_CRITERIA);
result = false;
}
if (StringUtils.isBlank(policyCriteria.getCriteriaValue())) {
addErrorMessage(formId + ":policyCriteria", MessageId.CRITERIA_VALUE_REQUIRED);
result = false;
}
return result;
}