Anonymous can't select the date picker box in register form

<div class="row"
           tal:define="error errors/birthdate| nothing;
                       birthdate request/birthdate | nothing;
                       inputname string:birthdate;

	                   formname string:join_form;
	                   inputvalue birthdate;
	                   starting_year python:1940;
	                   show_hm python:0;
	                   show_ymd python:1;"

           tal:attributes="class python:test(error, 'field error', 'join_form_field')">

        <h3 for="birthdate"
            i18n:translate="label_birthdate">Birth date</h3>


        <span class="fieldRequired" title="Required"
              i18n:attributes="title title_required;"
              i18n:translate="label_required">(Required)</span>


        <div class="formHelp" i18n:translate="help_birthdate">
          Enter your birth date
        </div>

        <div tal:content="error">Validation error output</div>

        <div metal:use-macro="here/calendar_macros/macros/calendarDatePickerBox">
             calendar pop-up
        </div>

      </div>