Look at line 2, column 0, byte 19 of the WSDL file that you're trying to consume, because XML::Parser wasn't happy with it. If you need more info, try looking at line 187 of the file /usr/local/lib/perl5/site_perl/5.8.3/sun4-solaris/XML/Parser.pm.

Update: or as gellyfish pointed out indirectly, it might be unhappy with line 2, column 0, byte 19 of the response from the SOAP message.