hello...

I wanted to create a page block table with checkboxes that'll let the user select one checkbox at a time (more like a radio button). I used wrapper classes for that. Everything seems to work fine but occasionally when i select an option...nothing happens. 

Here is the vf page im using:

<apex:pageBlock Title="SELECT THE CONTACT ASSOCIATED TO THE CURRENT ACCOUNT"
            rendered="{!contactdisplay}" id="pageBlock">
                       
            <apex:outputLabel >Please click on 'Last Name' to sort</apex:outputLabel>
            <apex:pageBlockSection rendered="{!location}">

<apex:outputLabel ><p style="font-family:verdana;color:red;">
             Error: Please select atleast one option.
             </p>
         </apex:outputLabel>            </apex:pageBlockSection>
            <apex:pageBlockSection columns="1" collapsible="false">
                <apex:pageBlockTable value="{!contactlocations}" var="cl">
                    <apex:column >
                        <apex:facet name="header">
                        </apex:facet>
                        <apex:inputCheckbox value="{!cl.selected}" id="checkedone">
                            <apex:actionSupport event="onchange" action="{!GetSelected2}"
                                onsubmit="deselectOther2(this)" rerender="Selected_PBS" />
                        </apex:inputCheckbox>
                    </apex:column>
                    <apex:column value="{!cl.cin.FirstName}" />
                    <apex:column >
                        <apex:facet name="header">
                            <apex:commandLink action="{!ViewData}" reRender="pageBlock"
                                value="Last Name{!IF(sortExpression=='lastname',IF(sortDirection='ASC','▼','▲'),'')}"
                                id="cmdSort" status="sorting">
                                <apex:param value="lastname" name="column"
                                    assignTo="{!sortExpression}" />
                            </apex:commandLink>
                            
                        </apex:facet>
                        <apex:outputLink value="/{!cl.cin.LastName}" target="_blank" />{!cl.cin.LastName}
</apex:column>
                    <apex:column value="{!cl.cin.Phone}" />
                    <apex:column value="{!cl.cin.Email}" />
                    <apex:column value="{!cl.cin.Title}" />
                    <apex:column value="{!cl.cin.MailingCity}" />
                    <apex:column value="{!cl.cin.MailingState}" />
                    <apex:column value="{!cl.cin.AccountId}" />
                </apex:pageBlockTable>
            </apex:pageBlockSection>
            <apex:pageblockButtons >
            <apex:commandButton action="{!foundContact}"  value="NEXT"/>
           <apex:commandButton action="{!notFound1}" value="NOT FOUND"/>
           </apex:pageblockButtons></apex:pageblock>

 }

function deselectOther2(chkBox2) {
            if (chkBox2.checked) {
                if ((chkBox2 != selectedChkbox2) && (selectedChkbox2 != null)) {
                    selectedChkbox2.checked = false;
                }
                selectedChkbox2 = chkBox2;
            }