Bing Translation Api access via SOAP interface from Perl SOAP::Lite

Hello all!

I write perl module for access to Bing Translation Api - Lingua::Translate::Bing. I want to use SOAP interface, but i can't it do. I already read this page "How to Call a .NET-based Web Service Using the SOAP::Lite Perl Library" , but it did't help me.

For example, i tried code:

sub getLanguagesForTranslate {
    my ($self) = @_; 
    my $token = $self->getAccessToken();
     $SOAP::Constants::DO_NOT_USE_CHARSET = 1;
    my $soap = SOAP::Lite->ns('http://api.microsofttranslator.com', 'tns')
                         ->readable(1)
                         ->proxy('http://api.microsofttranslator.com/V2/Soap.svc')
                         ->on_action(sub {return '"http://api.microsofttranslator.com/V2/LanguageService/GetLanguagesForTranslate"'});

    $soap->transport->http_request->header("Authorization" => $token);
    my $method = SOAP::Data->name('GetLanguagesForTranslate')->attr({xmlns => 'http://api.microsofttranslator.com/V2/LanguageService'});
    my @params = ( SOAP::Data->name("appId")->type("string")->value("")); 
    my $answer = $soap->call($method => @params);
    return $answer->result;
}

but it return "Unhandled Service Exception".

My SOAP request with this code is:

Where i was wrong?

Thanks for you attention!