error.log files are empty

[autogun]

Hello,

I've 2 websites im hosing on my ISPConfig setup which I followed "The Perfect Server - Debian Lenny".

While working on a website, I noticed my error.log file is empty.

(/var/www/xxx.com/log)-(3 files, 12Kb)--> ls -la
total 12
drwxr-x--x 2 root root    4096 2010-12-12 12:02 .
drwxr-xr-x 5 root root    4096 2010-12-09 12:46 ..
-rw-r--r-- 1 root root    2624 2010-12-12 12:33 20101212-access.log
lrwxrwxrwx 1 root root      19 2010-12-12 12:02 access.log -> 20101212-access.log
-rw-r--r-- 1 web1 client1    0 2010-12-09 01:55 error.log

I've checked the xxx.com.vhost file and it has the following entry
ErrorLog /var/log/ispconfig/httpd/xxx.com/error.log

So I followed this path and the file seems to be empty

(/var/log/ispconfig/httpd/xxx.com)-(3 files, 12Kb)--> ls -la
total 12
drwxr-x--x 2 root root    4096 2010-12-12 12:02 .
drwxr-xr-x 5 root root    4096 2010-12-09 12:46 ..
-rw-r--r-- 1 root root    2624 2010-12-12 12:33 20101212-access.log
lrwxrwxrwx 1 root root      19 2010-12-12 12:02 access.log -> 20101212-access.log
-rw-r--r-- 1 web1 client1    0 2010-12-09 01:55 error.log

I'd like to have error.log file for debugging, can you please suggest how to proceed?