ok

think you for your help , and sorry because i didn't put an important information
i runned a sh /script/sysinfo
A. Kloxo-MR: 6.5.0.f-2013031807
B. OS: CentOS release 5.9 (Final) i686
C. Apps:
1. MySQL: mysql-5.0.95-5.el5_9
2. PHP: php-5.2.17-29.el5
3. Httpd: httpd-2.2.23-3.el5
4. Lighttpd: lighttpd-1.4.32-1.el5
5. Nginx: nginx-1.3.15-1.el5
6. Qmail: qmail-toaster-1.03-1.3.22.mr.el5
with: dovecot-2.1.15-1.mr.el5
7. Dns: bind-9.9.2-2.P1.el5
D. Php-type (for Httpd/proxy):
E. Memory:
total used free shared buffers cached
Mem: 1010 737 272 0 36 448
-/+ buffers/cache: 252 758
Swap: 2047 0 2047
and i installed nginx and lighttpd