What's probably happening is that the service is coded crappily and is not handling this error gracefully. Did you try using a cookie_jar? I had a lot of problems getting that to work when I tried it, so I'll put this example (_handle_fault is from bric_soap in Bricolage, in case Sam Tregar reads this :) ):

#!/usr/bin/perl

use strict;
use warnings;

use SOAP::Lite trace => [qw(debug)], on_fault => \&_handle_fault;
import SOAP::Data 'name';

use HTTP::Cookies;
my $COOKIE_FILE = '/tmp/bs-wsdl-cookies.txt';

my $WSDL_FILE = 'file:///tmp/bricolage-simpletest.wsdl';

main();
exit;


sub main {
    my $client = SOAP::Lite->service($WSDL_FILE);

    # xxx: I have no idea what magic is done
    # to initialize things (transport),
    # so I end up calling login a 2nd time just to add the cookie_jar!
#    $client->login(name(username => 'admin'),
#                   name(password => 'change me now!'));
    $client->login('admin', 'change me now!');

    my $cookie_jar = HTTP::Cookies->new(ignore_discard => 1,
                                        file => $COOKIE_FILE,
                                        autosave=>1);
    $client->transport->cookie_jar($cookie_jar);

    # xxx: 2nd login
#    $client->login(name(username => 'admin'),
#                   name(password => 'change me now!')), $/;
    $client->login('admin', 'change me now!');


    # ....
}

# handle faults from SOAP::Lite's on_fault event
sub _handle_fault {
    my ($soap, $r) = @_;

    # print out the error as appropriate
    if (ref $r) {
        if ($r->faultstring eq 'Application error' and
            ref $r->faultdetail and ref $r->faultdetail eq 'HASH'    )
+ {
            # this is a bric exception, the interesting stuff is in de
+tail
            print STDERR "Call failed:\n\n",
              join("\n", values %{$r->faultdetail}), $/, $/;
        } else {
            print STDERR "Call failed:\n\n",
              $r->faultstring, $/, $/;
        }
        print STDERR "Check the Apache error log for more detail.\n";
    } else {
        print STDERR "TRANSPORT ERROR: ", $soap->transport->status, "\
+n";
        print STDERR "Check the Apache error log for more information.
+\n";
    }

    return SOAP::SOM->new();
}
[download]

I think that worked for me at least. Also, if you figure out how to only have to login once, I'd appreciate knowing how!

Maybe you should write it in Java.... I was complaining about WSDL support in Perl (generally Perl in the "enterprise") just the other day.