How can I debug the source of this error in XML::GDOME?

my $doc = XML::GDOME->createDocument("","","");

NAMESPACE_ERR at /usr/lib/perl5/site_perl/5.6.1/i586-linux/XML/GDOME.pm line 103.

sub createDocument {
  my $class = shift;
  return $di->createDocument(@_); ## it points to this LINE!!
}

$doc = XML::GDOME->createDocument( $nsURI, $name, $dtd );

my $doc = XML::GDOME->createDocument(undef,"","");

perl -we'use XML::GDOME; XML::GDOME->createDocument("","","")'

my $doc = XML::GDOME->createDocument(undef,"","");

** CRITICAL **: file gdome-xml-element.c: line 235 (gdome_xml_el_setAttribute): assertion `value != NULL' failed.

** CRITICAL **: file gdome-xml-element.c: line 235 (gdome_xml_el_setAttribute): assertion `value != NULL' failed.

** CRITICAL **: file gdome-xml-element.c: line 235 (gdome_xml_el_setAttribute): assertion `value != NULL' failed.