Can't run and watch xibo client in crontab

using xibo client v1.60.0-rc2 ubuntu 12.04 desktop system
server: xibo v1.6.1

to user root and it worked perfectly executed, but I put in crontab for user root can’t run

crontab -e
#every day closes xibo client and start new xibo client
59 23 * * * /bin/bash /home/telecom/ver.sh

ver.sh

#!/bin/bash
f=$(pgrep “python” | wc -l )
if [ $f > 0 ] ;then
pgrep python | xargs kill -9
fi
sleep 1
cd /home/telecom/
./xibolaunch.sh &

xibolaunch.sh

#!/usr/bin/expect
spawn su
expect -re {password: }
send – "<password>\r"
expect "root@telecom:/home/telecom# "
send – "\r\r"
send – "cd /opt/xibo/pyclient/client/python/\r"
send – "./run.sh\r"
expect eof

how do I fix it ???