$mech->tick( name => 'wt_2000-selector[3]', value => 'Select');
$mech->select( name => '%%RBGROUP16843009', value => 'wt_2000-selector[3]');
$mech->submit_form( form_name=>'%%RBGROUP16843009',fields=>'wt_2000-selector[3]', button => 'Select');