First, thanks for your patience and all your help,some questions:
1) i deleted poller.php line from /etc/cron.d/cacti should i add cactid ?
2) i made cactid to connect to mysql but the output from cactid is now:
CACTID: Using cactid config file [cactid.conf]
WARNING: Unrecongized directive: SNMP_Ver=2 in cactid.conf
CACTID: Version 0.8.6f starting
CACTID: Host[1] No host availability check possible for '127.0.0.1'
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/linux_memory.pl MemFree:'
CACTID: Host[1] DS[3] WARNING: Result from SCRIPT not valid. Partial Result: ...CACTID: Host[1] DS[3] SCRIPT: perl /usr/share/cacti/site/scripts/linux_memory.pl MemFree:, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/linux_memory.pl MemFree:'
CACTID: Host[1] DS[33] WARNING: Result from SCRIPT not valid. Partial Result: ...
CACTID: Host[1] DS[33] SCRIPT: perl /usr/share/cacti/site/scripts/linux_memory.pl MemFree:, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/linux_memory.pl SwapFree:'
CACTID: Host[1] DS[4] WARNING: Result from SCRIPT not valid. Partial Result: ...CACTID: Host[1] DS[4] SCRIPT: perl /usr/share/cacti/site/scripts/linux_memory.pl SwapFree:, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/linux_memory.pl SwapFree:'
CACTID: Host[1] DS[34] WARNING: Result from SCRIPT not valid. Partial Result: ...
CACTID: Host[1] DS[34] SCRIPT: perl /usr/share/cacti/site/scripts/linux_memory.pl SwapFree:, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/loadavg_multi.pl'
CACTID: Host[1] DS[5] WARNING: Result from SCRIPT not valid. Partial Result: ...CACTID: Host[1] DS[5] SCRIPT: perl /usr/share/cacti/site/scripts/loadavg_multi.pl, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/loadavg_multi.pl'
CACTID: Host[1] DS[35] WARNING: Result from SCRIPT not valid. Partial Result: ...
CACTID: Host[1] DS[35] SCRIPT: perl /usr/share/cacti/site/scripts/loadavg_multi.pl, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/ping.pl 127.0.0.1'
CACTID: Host[1] DS[43] WARNING: Result from SCRIPT not valid. Partial Result: ...
CACTID: Host[1] DS[43] SCRIPT: perl /usr/share/cacti/site/scripts/ping.pl 127.0.0.1, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/unix_processes.pl'
CACTID: Host[1] DS[7] WARNING: Result from SCRIPT not valid. Partial Result: ...CACTID: Host[1] DS[7] SCRIPT: perl /usr/share/cacti/site/scripts/unix_processes.pl, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/unix_processes.pl'
CACTID: Host[1] DS[32] WARNING: Result from SCRIPT not valid. Partial Result: ...
CACTID: Host[1] DS[32] SCRIPT: perl /usr/share/cacti/site/scripts/unix_processes.pl, output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/unix_users.pl '
CACTID: Host[1] DS[6] WARNING: Result from SCRIPT not valid. Partial Result: ...CACTID: Host[1] DS[6] SCRIPT: perl /usr/share/cacti/site/scripts/unix_users.pl , output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/unix_users.pl '
CACTID: Host[1] DS[36] WARNING: Result from SCRIPT not valid. Partial Result: ...
CACTID: Host[1] DS[36] SCRIPT: perl /usr/share/cacti/site/scripts/unix_users.pl , output: U
CACTID: Host[1] ERROR: Empty result [127.0.0.1]: 'perl /usr/share/cacti/site/scripts/ws_apachestats.pl 127.0.0.1'
CACTID: Host[1] DS[47] WARNING: Result from SCRIPT not valid. Partial Result: ...
CACTID: Host[1] DS[47] SCRIPT: perl /usr/share/cacti/site/scripts/ws_apachestats.pl 127.0.0.1, output: U
CACTID: Time: 0.7701 s, Threads: 1, Hosts: 3