Cron don't work

Hi

I have vu+solo + openpli 4.0, I want to use crontab with somes scripts

I have installed busybox-cron and edit crontab with crontab -e

root@vusolo:~# crontab -l
1 * * * * /etc/cccamchk.sh >/etc/1.txt

but when I check 1.txt file..already empty

if I execute cccamchk.sh manually it's work

root@vusolo:~# /etc/cccamchk.sh
CCcam... ok

ps command output :

997 root      3144 S    crond -c /etc/cron/crontabs

root@vusolo:~# cat /etc/cron/crontabs/root
1 * * * * /etc/cccamchk.sh >/etc/1.txt