for my $d ( $xmlResponse->dataof("//MT_LABEL_IN/HEADER/*") ){
    print "$d   ", $d->name, " = ", $d->value, "\n",
}
__END__
SOAP::Data=HASH(0xa6a76c)   material = 12659-250GM
SOAP::Data=HASH(0xa6ab5c)   batch = D00166202
SOAP::Data=HASH(0xa6af74)   material_desc = Albumin, Bovine Serum, Fract 1PC x 250GM
SOAP::Data=HASH(0xa6b744)   plant = US05