I've tried uninstalling and reinstalling the Perl Dev Kit.
My Module Search Path looks right ...
/Users/.../Library/ActivePerl-5.20/lib
/usr/local/ActivePerl-5.20/site/lib
/usr/local/ActivePerl-5.20/lib
.
It looks to me like PerlApp is picking up the OS X 10.9 version instead of the installed ActiveState version. I did have an older version of PerlApp but I think I have uninstalled it ok.
Help!!!