Most likely, that means that your Perl is not Active State Perl 5.10 on Windows XP/Vista/7 32bit .

Look at the output of perl -v, and see whether it is Perl 5.10. For me, this outputs

This is perl 5, version 12, subversion 1 (v5.12.1) built for MSWin32-x
+86-multi-thread

Copyright 1987-2010, Larry Wall

Perl may be copied only under the terms of either the Artistic License
+ or the
GNU General Public License, which may be found in the Perl 5 source ki
+t.

Complete documentation for Perl, including FAQ lists, should be found 
+on
this system using "man perl" or "perldoc perl".  If you have access to
+ the
Internet, point your browser at http://www.perl.org/, the Perl Home Pa
+ge.
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