Unable to save dynamic added row - jsf-2

Question

I am adding row dynamicall on click of commandButton.
in which I have two textfield and one dropdown and last column is save.
I am able to save old data which are already in DB,
But unable to save the newly added row. actually control is not reaching to bean when I click on save commandLink.
<div>
<div class="float_right">
<p:commandButton styleClass="add_uom"
value="#{msg['uom.add.new.uom']}" process="#this"
actionListener="#{uomBean.addRow}" immediate="true"
update=":uomFormId:languageDetail">
</p:commandButton>
</div>
<div class="clear"> </div>
<div>
<h:panelGroup id="languageDetail">
<table width="100%" cellspacing="1" cellpadding="1"
border="0" class="role_detail_section">
<thead>
<tr>
<ui:repeat var="language" value="#{uomBean.languageList}">
<th>#{language.languageCode}</th>
</ui:repeat>
<th>#{msg['uom.measuremnet.type.heading']}</th>
<th>#{msg['uom.save']}</th>
<th>#{msg['uom.activate.deactivate.heading']}</th>
</tr>
</thead>
<tbody>
<ui:repeat var="uom" value="#{uomBean.uomDTOList}">
<tr>
<ui:repeat var="uomCountry" value="#{uom.uomList}">
<td><h:inputText styleClass="values"
value="#{uomCountry.languageValue}" /></td>
</ui:repeat>
<td><h:selectOneMenu
value="#{uom.measureTypeId}"
required="true"
requiredMessage="#{msg['uom.measurement.error.msg']}">
<f:selectItem itemLabel="Select" itemValue="0" />
<f:selectItems value="#{uomBean.measureList}"
var="uomtDTO"
itemLabel="#{uomtDTO.measurmentTypeValue}"
itemValue="#{uomtDTO.measurmentTypeId}" />
</h:selectOneMenu></td>
<td>
<p:commandLink value="Saving.." action="#{uomBean.testUOM()}" ></p:commandLink>
</td>
</td>
</tr>
</ui:repeat>
</tbody>
</table>
</h:panelGroup>
<h:messages globalOnly="true" />
</div>
</div>
UOMDTO is
private Country country;
private Language language;
private String uomDisplayName;
private String uomDescription;
private List<UOMDetailDTO> uomList;
private Integer measureTypeId;
and UOMDetailDTO is
private String languageName;
private String languageCode;
private String languageValue;

Answer 1

Would be nice to see the source of uomBean.
I can only guess, but if uomBean is request scoped, the new row has been "lost" by the time you click save and thus cannot be saved. If uomBean is view or session scoped, then I would guess that you somehow reset/reload your uomDTOList, loose the new row and get the same problem as if it was request scoped.