Input field rendered by Ajax cannot be used to input values?

[Namitha karupaiya]

 
            <h:form>
            Do you have a driving license? 
            <h:selectOneMenu value="#{requestScope.license}">
                <f:selectItem itemLabel="Select..." itemValue=""/>
                <f:selectItem itemLabel="Yes" itemValue="Y"/>
                <f:selectItem itemLabel="No" itemValue="N"/>
                <f:ajax render="@form"/>
            </h:selectOneMenu>
            <br/>
            Enter driving license number: 
            <h:inputText value="#{requestScope.number}" rendered="#{'Y' eq requestScope.license ? true : false}"/>
            <br/>
            <h:commandButton value="Submit"/>
            <br/>
            Your driving license number is: #{requestScope.number}
            </h:form>

The above JSF 2.0 markup depicts a very common scenario.

If the user selects “Yes” for the question “Do you have a driving license?”, then the “Enter driving license number:” field is rendered by Ajax.

If the user enters the driving license number and presses the button, the input data should be displayed at the bottom (according to my understanding), but it is not happening.

Please anyone explain this.