running crontab in cygwin

Hi I have installed cygwin on my windows 2003 machine and also crontab is installed.
but crontab is not running jobs that I have scheduled. please suggest.
File are also getting generated in /var/log as Cygwin cron.log but there is no content.
Please find below enrty in crontab -l
$ crontab.exe -l
# DO NOT EDIT THIS FILE - edit the master and reinstall.
# (/tmp/crontab.obNPq2wQy0 installed on Thu Jun 18 15:56:49 2009)
# (Cron version V5.0 -- $Id: crontab.c,v 1.12 2004/01/23 18:56:42 vixie Exp $)
########### CDR FOR MSS01 ###################
46 15 * * * cd /cygdrive/d/cdr/mss01/chu0; perl mss01_chu0_telnet.pl > /tmp/test

18 14 * * * /cygdrive/d/cdr/mss01/chu0/mss01_chu0_file_separator.sh > /dev/null

10 01 * * * /cygdrive/d/cdr/mss01/chu1/mss01_chu1_telnet.pl > /dev/null
15 01 * * * /cygdrive/d/cdr/mss01/chu1/mss01_chu1_file_separator.sh > /dev/null

10 03 * * * cd /cygdrive/d/cdr/mss01/chu2; perl mss01_chu2_telnet.pl > /dev/null

15 03 * * * cd /cygdrive/d/cdr/mss01/chu2; perl mss01_chu2_file_separator.sh > /dev/null
57 15 * * * cd /cygdrive/d/cdr/mss01/chu0; ./test.sh