How can I restore Visual CRON ,manager to WebMin

Hi

Since a shockwave attack the other year I have lost my visual CRON job manager tool in WebMin.

When I click on the menu option "System > Scheduled Cron Jobs" I just get the following message

"The command crontab for managing user Cron configurations was not found. Maybe Cron is not installed on this system?"

However I know that CRON JOBS are running because

a) I have a CRON job that sends out bulk emails every morning and they are still being sent b) I have CRON jobs for a number of plugins to fire them and they still work e.g building SiteMaps, Importing Feed Content and running TweetBOT jobs.

So I am guessing it's a permission issue or something has been changed that is blocking WebMin from loading them up in GUI fashion.

When I login to a console and run

crobtab -e

I get

crobtab: command not found

If I run any of these

crontab -u user1 -l

crontab -u root -l

I get

/usr/bin/crontab: Permission denied

When I run

ls /var/spool/cron/crontabs

I can see a list of users

user1 user2 user3 root

When I run this

sudo ls -root /var/spool/cron/crontabs

I get back some information

total 16 -rw------- 1 user1 201 Oct 14 2011 user1 -rw------- 1 user2 1668 Jan 28 2014 user2 -rw------- 1 user3 1953 Oct 5 2014 user3 -rw------- 1 root 1592 Oct 7 2014 root

If I run this

ls -user1 /usr/bin/crontab

I get back

9240919 32 ---------- 1 root 32 Jun 1 07:03 /usr/bin/crontab

So the cron jobs are obviously there and assigned to users but I am guessing the permissions are incorrect for some reason which is why it doesn't run in WebMin or load up in the console.

What commands should I run to restore the visual cron tab in WebMin or view the jobs in the console?

I have seen this article > http://serverfault.com/questions/78159/what-could-cause-permission-denie...

But I don't want to just start running commands willy nilly as I am not exactly a LINUX expert and don't want to make things worse.

Thanks

Rob