Backup does not work

On Ubuntu 10.04:

Setup:
I have installed ISP Config using the perfect server step by step.
I have setup a couple of sites to backup and
the Directory /var/backup, has created some subdirectories but there are no data in them. I have set them to daily backup in the ISP CONFIG 3

But i have a problem. Backup does not backup directories.
Webalizer is installed. I have checked this.

PROBLEM:
But when i run the job cron_daily.sh i get an error: PHP Notice: Undefined offset: 1 in /usr/local/ispconfig/server/cron_daily.php on line 95

x 100 times

what is wrong can you help me ?

is some packages missing to be installed or what is wrong?

This is a sub view of my execution log from from CRON:
PHP Notice: Undefined offset: 1 in /usr/local/ispconfig/server/cron_daily.php on line 95
PHP Notice: Undefined variable: append in /usr/local/ispconfig/server/cron_daily.php on line 107
sh: zip: command not found
find: `standard output': Broken pipe
find: write error
sh: zip: command not found
find: `standard output': Broken pipe
find: write error
sh: zip: command not found
find: `standard output': Broken pipe
find: write error
finished.

Im running PHP version :PHP 5.3.2-1ubuntu4.5 with Suhosin-Patch (cli) (built: Sep 17 2010 13:49:46)
Copyright (c) 1997-2009 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies

 

Solved

Line 95 @list in front of line
line 107 instead of if ($apend == 1) out...
changed to (removed (if ($apend == 1) )
out ..

then it worked!