use SOAP::Lite +trace => "all";

my $ser = SOAP::Serializer->new();
$ser-> register_ns ("http://www.egem.nl/StUF/StUF0205", "StUF");
$ser-> register_ns ("http://www.vrom.nl/wkpb0102", "wkpb");
$ser-> register_ns ("http://www.vrom.nl/wkpb/stuf", "wkpb-stuf");

my $method = SOAP::Data
    -> prefix ('wkpb-stuf')
    ;

my $soap = SOAP::Lite 
    -> serializer ($ser)
    -> readable (1)
    -> proxy ($ep)
    -> call ($method => SOAP::Data->type('xml' => $aanvraag))
    ;