problem in install cacti ! recived error ! please help

[hesam]

hi
when install cacti recived this error :
[NOT FOUND] RRDTool Binary Path: The path to the rrdtool binary.
[NOT FOUND] PHP Binary Path: The path to your PHP binary file
[NOT FOUND] snmpwalk Binary Path:
[NOT FOUND] snmpget Binary Path:
[NOT FOUND] snmpbulkwalk Binary Path:
[NOT FOUND] snmpgetnext Binary Path
how can fix this problem ?
my server os centos 6.4 64bt
and control panel directadmin
thanks