MySQL Slow Log ERROR

In my.cnf

i add these lines

#######
log-bin
log-slow-queries = /var/log/mysqld-slow.log
long_query_time=1
#######

But I can't use slow-log
cause i see mysqld.log
i found

########
070211 20:04:25 mysqld started
^G/usr/libexec/mysqld: File '/var/log/mysqld-slow.log' not found
(Errcode: 13)
070211 20:04:25 [ERROR] Could not use /var/log/mysqld-slow.log for
logging (error 13). Turning logging off for the whole duration of the
MySQL server process. To turn it on again: fix the cause, shutdown the
MySQL server and restart it.
/usr/libexec/mysqld: ready for connections.
Version: '4.1.20-log' socket: '/var/lib/mysql/mysql.sock' port: 0
Source distribution
########


but in the directory /var/log i have "mysqld-slow.log" file


Anyone can help me ?
Thank you very much
Prat.


PS. /var/log/

[root@ict log]# ls -l
total 1192
-rw-r----- 1 root root 1037 Feb 9 22:52 acpid
-rw------- 1 root root 15041 Feb 9 18:50 anaconda.log
-rw------- 1 root root 23671 Feb 9 18:50 anaconda.syslog
-rw------- 1 root root 41403 Feb 9 18:50 anaconda.xlog
drwxr-x--- 2 root root 4096 Apr 20 2006 audit
-rw------- 1 root root 1144 Feb 11 20:04 boot.log
-rw------- 1 root root 32335 Feb 11 04:03 boot.log.1
drwxr-xr-x 2 clamav clamav 4096 Feb 11 18:23 clamav
-rw------- 1 root root 49761 Feb 11 21:55 cron
-rw------- 1 root root 90791 Feb 11 04:03 cron.1
drwxr-xr-x 2 lp sys 4096 Feb 11 04:03 cups
-rw-r--r-- 1 root root 17238 Feb 9 22:51 dmesg
drwxr-xr-x 2 root root 4096 Feb 9 18:54 gdm
drwx------ 2 root root 4096 Feb 11 16:11 httpd
-r-------- 1 root root 146584 Feb 11 21:39 lastlog
drwx------ 2 root root 16384 Feb 10 01:34 lost+found
drwxr-xr-x 2 root root 4096 Feb 9 18:38 mail
-rw------- 1 root root 7898 Feb 11 21:30 maillog
-rw------- 1 root root 13381 Feb 11 04:03 maillog.1
-rw------- 1 root root 9139 Feb 11 21:39 messages
-rw------- 1 root root 213732 Feb 11 04:03 messages.1
-rw-r--r-- 1 root root 20448 Feb 11 21:50 mrtg.log
-rw-r----- 1 mysql mysql 7970 Feb 11 20:04 mysqld.log
-rw-r--r-- 1 mysql mysql 0 Feb 11 19:44 mysqld-slow.log
drwx------ 2 root root 4096 Nov 2 2004 ppp
-rw-r--r-- 1 root root 34155 Feb 10 04:02 prelink.log
-rw-r--r-- 1 root root 22816 Feb 11 04:03 rpmpkgs
-rw-r--r-- 1 root root 22816 Feb 10 04:02 rpmpkgs.1
drwx------ 2 root root 4096 Jul 11 2006 samba
-rw-r--r-- 1 root root 63050 Feb 9 18:43 scrollkeeper.log
-rw------- 1 root root 3352 Feb 11 21:39 secure
-rw------- 1 root root 4746 Feb 10 18:04 secure.1
-rw-r--r-- 1 root root 160 Feb 11 04:10 snmpd.log
-rw-r--r-- 1 root root 210 Feb 11 04:03 snmpd.log.1
-rw------- 1 root root 0 Feb 11 04:03 spooler
-rw------- 1 root root 0 Feb 9 18:36 spooler.1
drwxr-x--- 2 squid squid 4096 Nov 23 2005 squid
drwxr-xr-x 2 root root 4096 Oct 5 2004 vbox
-rw------- 1 root root 5067 Feb 11 18:04 vsftpd.log
-rw-rw-r-- 1 root utmp 90240 Feb 11 21:39 wtmp
-rw-r--r-- 1 root root 42734 Feb 9 19:23 Xorg.0.log
-rw-r--r-- 1 root root 34730 Feb 9 19:18 Xorg.0.log.old