Can't get snortsnarf to work

Sorry for this email I am sure you have gotten a ton of them. However I 
am unable to get snortsnarf to work. My command line usage is a follows

monkeylabs:/home/don/SnortSnarf-021111.1 # ./snortsnarf.pl -gmt 
/home/don/OOS_Report_2003_03_26_15824.txt 
/home/don/OOS_Report_2003_03_27_23034.txt

This results in the following error

Can't locate Time/ParseDate.pm in @INC (@INC contains: ./include 
/usr/lib/perl5/5.6.1/i586-linux /usr/lib/perl5/5.6.1 
/usr/lib/perl5/site_perl/5.6.1/i586-linux /usr/lib/perl5/site_perl/5.6.1 
/usr/lib/perl5/site_perl . ./include/SnortSnarf) at 
include/SnortSnarf/TimeFilters.pm line 18.
BEGIN failed--compilation aborted at include/SnortSnarf/TimeFilters.pm 
line 18.
Compilation failed in require at include/SnortSnarf/Filter.pm line 19.
BEGIN failed--compilation aborted at include/SnortSnarf/Filter.pm line 19.
Compilation failed in require at ./snortsnarf.pl line 87.
BEGIN failed--compilation aborted at ./snortsnarf.pl line 87.


I have looked in the Time directory and noted nothing there. Could you 
please tell me if I am invoking this correctly? I basically am trying to 
recreate the same type
of output as evidenced on the home page example. Thanks for your time.
Cheers!
Don