thanks but I deleted the line
<div id="dtnav_buttons" style="clear:both">
<input type="button" class="dth-btn dth-btn-default" value="<?php echo JText::_( 'DT_BACK' ); ?>" onclick="javascript:history.back();" /> <input type="submit" id="next" name="saveuser" class="dth-btn dth-btn-primary" value="<?php echo JText::_( 'DT_NEXT_BUTTON' );?>" />
in::
/components/com_dtregister/templates/default/views/user/edit.php
and no change.
Please advise