shell script not working as cron, tried every solution, out of ideas

I have the following script to update file based on MD5 comparison, script works perfectly from command line but when i put it in cron nothing happens. I only have root user on the system, script is owned by root, in crontab am calling the script like this: /bin/bash /home/papa/systems/sron.sh

Here is my script, I have tried all the solutions I have read till now but no progress, please help.

#!/bin/bash


PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"

MD5FILE=/tmp/.md5oldjar
MD5FILENEW=/tmp/.md5newjar
FILE_TO_CHECK=/tmp/rose.jar
URL=http://xxxx
DESTINATION=/tmp

rm -rf $FILE_TO_CHECK

wget $URL -P $DESTINATION


#echo generating MD5 for $FILE_TO_CHECK  

echo `md5sum $FILE_TO_CHECK` > $MD5FILENEW
MD5PRINT=`cat $MD5FILENEW`

if [ -z "$MD5PRINT" ]; then
    echo "ERROR Recived an empty MD5PRINT thats not valid, aborting"
    exit 1


fi

OLDMD5PRINT=`cat $MD5FILE`



if [ -z "$OLDMD5PRINT" ]; then
    echo "Got an empty string from the oldfile, aborting"
    echo $OLDMD5PRINT 
    exit 1
fi


if [ "$OLDMD5PRINT" != "$MD5PRINT" ]; then 
    echo "File has changed"
    echo "updating MD5 file...."
    echo $MD5PRINT > $MD5FILE
    echo "file content:"
    cat $MD5FILE
    echo `date` >> /home/log
    echo done
else
    echo nothing >> /home/log
fi