Not getting inputText value in Controller Class

Hi folks,

  Here is my VFP : 

<apex:outputPanel id="section">
                <apex:actionRegion >
                    <apex:repeat var="question" value="{!questionsMap}">
                        <br/><apex:outputText escape="false" value="<b>{!question}</b>"/><br/>
                        <apex:repeat var="answer" value="{!questionsMap[question]}" >
                            <apex:outputText escape="false" value="<b>{!answer}</b>"/>
                            <apex:inputText value="{!inputScore}" id="Score" label="Score">
                                <apex:actionSupport event="onchange" action="{!populateAnswers}" reRender="dummy">
                                    <apex:param assignTo="{!answeredQuestion}" value="{!question}" name="answeredQuestion"/>
                                    <apex:param assignTo="{!answers}" value="{!answer}" name="answers"/>
                                </apex:actionSupport>
                            </apex:inputText>
                        </apex:repeat>
                    </apex:repeat>
                </apex:actionRegion> 
            </apex:outputPanel>

In apex Controller inputText value(inputScore) is not populated : 

public void populateAnswers(){
        System.debug('***'+questionAnswerMap);
        System.debug('***'+answers);
        System.debug('***'+inputScore);
        System.debug('***'+score);
        answeredQuestion = Null;
        answers = Null;
    }

Also i have tried to send the value with apex:param, but fails.