The following error message was received by Perl application:
Unrecognized type ‘{http://www.w3.org/1999/XMLSchema}dateTime

The problem is caused by “dateTime” type: it was not supported in the 1999 XML Specification.
The solution is to switch to 2001 schema:

[cc lang=”Perl”]
my $soap = SOAP::Lite->uri( $NAMESPACE )->proxy( $PROXY_URL )->xmlschema (‘2001’);
[/cc]