Odd. The following works fine for me with and ActiveState install of Perl 5.10.1 on Windows 7:

use warnings;
use strict;
use Time::HiRes;

my ($epochSecs, $epochUSecs) = Time::HiRes::gettimeofday ();

print "$epochSecs $epochUSecs $Time::HiRes::VERSION";
[download]

Prints:

1320191917 602197 1.9724
[download]

and worked for version 1.9719 of Time::HiRes too.