Using Active State Perl 5.16.2 there is no perlpath entry in Config. Therefore, CGI::Capture dies with:
Current PERL_PATH undef does not match the captured CGI call "C\:\\Perl64\\bin\\perl\.exe" at C:/Perl64/site/lib/CGI/Capture.pm line 493.
This is what is available in C:\Perl64\lib\Config.pm:
tie %Config, 'Config', {
archlibexp => 'C:\Perl64\\lib',
archname => 'MSWin32-x64-multi-thread',
d_readlink => undef,
d_symlink => undef,
dlext => 'dll',
dlsrc => 'dl_win32.xs',
dont_use_nlink => undef,
exe_ext => '.exe',
inc_version_list => '',
intsize => '4',
ldlibpthname => '',
osname => 'MSWin32',
osvers => '5.2',
path_sep => ';',
privlibexp => 'C:\Perl64\\lib',
scriptdir => 'C:\Perl64\\bin',
sitearchexp => 'C:\Perl64\\site\\lib',
sitelibexp => 'C:\Perl64\\site\\lib',
so => 'dll',
useithreads => 'define',
usevendorprefix => undef,
version => '5.16.2',
};