Cron almost working but not quite...

[n00ben]

I've installed and set up Cron.

I've set edited crontabs to append uptime to a file each 5 min.

if I run 'logread' I get (among many other things) :
"jan 8 18:25:01 cron[1259]: (root) CMD (uptime >> /opt/etc/crontest.txt)"

my crontabs look like this:

SHELL=/opt/bin/bash
PATH:/sbin:/bin:/usr/sbin:/usr/bin:/opt/sbin/:/opt/usr/bin:/opt/usr/sbin
MAILTO=""
HOME=/
#-----------
*/5 * * * * root uptime >> /opt/etc/crontest.txt


but crontest.txt is empty and nothing is ever written to the file...

/regards
Henrik