use strict;   #update had left this off before 
use warnings;
package MY_package;
use vars qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $VERSION);
use Exporter;
our $VERSION=1.0;
our @ISA = qw(Exporter);
our @EXPORT = qw($c_freq );

our $c_freq = 2;  #now $c_freq is visible as a global