JSF: Add AjaxBehaviour to dynamically generated HTMLInputText - ajax

Question

I want to create UIComponents with an AjaxBehaviour dynamically and add it to a HTMLPanelGrid. The ajax method will be called but there was no value binding before and no rendering after that. Please help me! Thank you so much! Here is some code:
The Ajax function:
public void ajax(AjaxBehaviorEvent event) {
HtmlPanelGrid grid = (HtmlPanelGrid) event.getComponent().getParent();
HashMap<String, Object> params;
try {
ajaxSet(grid);
params = collect();
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
SearchComponent search = (SearchComponent) ComponentRegistry.instance()
.getComponent(IComponentConstants.SEARCH);
this.score = Integer.toString(search.getSystemsCount(params));
}
The function for creating a HTMLInputText:
public HtmlInputText inputText(String id, String expression,
UIComponent parent, AjaxBehaviorListener listener) {
HtmlInputText text = new HtmlInputText();
text.setId(id);
if (!expression.isEmpty()) {
text.setValueExpression("value", createValueExpression(expression));
}
AjaxBehavior ajax = (AjaxBehavior) FacesContext.getCurrentInstance()
.getApplication().createBehavior(AjaxBehavior.BEHAVIOR_ID);
ajax.setExecute(Arrays.asList(new String[] { "#form" }));
ajax.setRender(Arrays.asList(new String[] { "#all" }));
ajax.addAjaxBehaviorListener(listener);
text.addClientBehavior("valueChange", ajax);
add(text, parent);
return text;
}
The function for creating the fields depending on a list with the desired field informations and the listener:
public void createSearchFields(UIComponent parent) {
String beanname = Utilities.lookupManagedBeanName(this);
GUIHelper helper = GUIHelper.instance();
for (Searchfield searchfield : shown) {
helper.label(searchfield.id, searchfield.displayname, parent);
for (Field f : searchdto.getClass().getDeclaredFields()) {
GUISearchField gsf = f.getAnnotation(GUISearchField.class);
if (gsf == null)
continue;
if (gsf.id().equals(searchfield.id)) {
String expression = "#{" + beanname + ".searchdto."
+ f.getName() + "}";
helper.inputText(searchfield.id, expression, parent, this);
}
}
}
}
#Override
public void processAjaxBehavior(AjaxBehaviorEvent event)
throws AbortProcessingException {
ajax(event);
}
public abstract void ajax(AjaxBehaviorEvent event);
The xhtml part:
<h:form id="searchform" styleClass="ibm-column-form ibm-styled-form">
<h:panelGrid columns="2" binding="#{systemsearchable.searchfields}">
</h:panelGrid>
<h:commandButton value="Search" action="#{systemsearchable.search}">
<f:ajax execute="#form" render="results"></f:ajax>
</h:commandButton>
</h:form>
If you need more info please let me know :)