求助CACTI无法显示图片

joegan

系统LINUX AS 4 U4
添加完本机监控后发现
SNMP Information
System: Linux localhost.localdomain 2.6.9-11.EL #1 Fri May 20 18:17:57 EDT 2005 i686
Uptime: 97753 (0 days, 0 hours, 16 minutes)
Hostname: localhost.localdomain
Location: Unknown (edit /etc/snmp/snmpd.conf)
Contact: Root root@localhost (configure /etc/snmp/snmp.local.conf)

说明SNMP应该是可以正常工作的。
Associated Graph Templates

Graph Template Name Status
1) Host MIB - Logged in Users  Is Being Graphed (Edit)   
2) Host MIB - Processes  Is Being Graphed (Edit)   
3) Linux - Memory Usage  Is Being Graphed (Edit)   
4) ucd/net - CPU Usage  Is Being Graphed (Edit)   
5) ucd/net - Memory Usage  Is Being Graphed (Edit)   
6) Unix - Load Average  Is Being Graphed (Edit)   
7) Unix - Logged in Users  Is Being Graphed (Edit)   
Unix - Processes  Is Being Graphed (Edit)  

Associated Data Queries

Data Query Name Debugging Re-Index Method Status
1) Karlnet - Wireless Bridge Statistics  (Verbose Query)  Index Count Changed  Success [4 Items, 1 Row]      
2) Netware - Get Available Volumes  (Verbose Query)  Verify All Fields  Success [3 Items, 1 Row]      
3) SNMP - Get Mounted Partitions  (Verbose Query)  Uptime Goes Backwards  Success [0 Items, 0 Rows]      
4) SNMP - Interface Statistics  (Verbose Query)  Uptime Goes Backwards  Success [20 Items, 3 Rows]      
5) ucd/net - Get Monitored Partitions  (Verbose Query)  Uptime Goes Backwards  Success [3 Items, 1 Row]      
6) Unix - Get Mounted Partitions  (Verbose Query)  Uptime Goes Backwards  Success [10 Items, 5 Rows]     

但在graphs中查看图片全部显示一个X，查过了系统是有装GD，执行
[root@localhost etc]# rpm -qa | grep -i gd
sysklogd-1.4.1-26_EL
gdbm-devel-1.8.0-24
gdbm-1.8.0-24
gdm-2.6.0.5-7.rhel4.1
gdk-pixbuf-0.22.0-16.el4
gdb-6.3.0.0-0.31
gd-2.0.28-4
gd-devel-2.0.28-4
[root@localhost etc]#
看起来GD是正常的
CACTI安装在/opt/cacati中，其中的rra的权限是是777，但里面没有任何数据,rra/log里面也没有任何数据，请各位前辈帮忙一下，谢谢