use SOAP::Lite +trace;
my $soap = SOAP::Lite->new();
$soap->proxy('http://dev.iban-bic.com/Riban/soap2/');

my @params = (
    SOAP::Data->name('params')->value(
    \SOAP::Data->name('item')->value([
            SOAP::Data->name('key')->value('country'),
            SOAP::Data->name('value')->value('DE'),
        ])
    ),
    SOAP::Data->name('user')->value('foo'),
    SOAP::Data->name('password')->value('bar')
);
my $result = $soap->call('get_form', @params);