hi rhq-users

i have been installed rhq agent.
The following error occurs.

my system jdk version : jdk1.6.0_37

*rhq-agent log 
WARN  [main] (org.rhq.enterprise.agent.AgentMain)- {AgentMain.native-sysinfo-unavailable}Native system info is enabled, but the system info API is not accessible on this platform (sigar.jar not found in classpath or SIGAR shared library not found in shared library path). Enable DEBUG logging for more details.

# sh rhq-agent-wrapper.sh start
rhq-agent-wrapper.sh: pidfile will be located at /usr/local/rhq-agent/bin/rhq-agent.pid
Starting RHQ Agent...
rhq-agent-wrapper.sh: Start script found here: /usr/local/rhq-agent/bin/rhq-agent.sh
rhq-agent-wrapper.sh: Executing agent with command: '/usr/local/rhq-agent/bin/rhq-agent.sh'
rhq-agent.sh: RHQ_AGENT_HOME: /usr/local/rhq-agent
rhq-agent.sh: No embedded JRE found - will try to use JAVA_HOME: /usr/local/jdk
rhq-agent.sh: RHQ_AGENT_JAVA_HOME: /usr/local/jdk
rhq-agent.sh: RHQ_AGENT_JAVA_EXE_FILE_PATH: /usr/local/jdk/bin/java
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/commons-io-1.4.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/commons-logging-1.1.0.jboss.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/concurrent-1.3.4-jboss-update1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/dom4j-1.6.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/getopt-1.0.13.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/i18nlog-1.0.10.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/jboss-common-1.2.1.GA.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/jboss-jmx-4.2.3.GA.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/jboss-remoting-2.2.2.SP8.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/jboss-serialization-1.0.3.GA.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/jline-0.9.94.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/log4j-1.2.16.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/persistence-api-1.0.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-common-drift-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-core-client-api-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-core-comm-api-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-core-domain-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-core-native-system-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-core-plugin-api-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-core-plugin-container-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-core-util-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-enterprise-agent-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/rhq-enterprise-comm-4.5.1.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/rhq-agent/lib/sigar-1.6.5.132-3.jar
rhq-agent.sh: CLASSPATH entry: /usr/local/jdk/lib/tools.jar
rhq-agent.sh: RHQ_AGENT_JAVA_OPTS: -Xms64m -Xmx128m -Djava.net.preferIPv4Stack=true
rhq-agent.sh: RHQ_AGENT_JAVA_ENDORSED_DIRS: /usr/local/rhq-agent/lib/endorsed
rhq-agent.sh: RHQ_AGENT_JAVA_LIBRARY_PATH: /usr/local/rhq-agent/lib
rhq-agent.sh: RHQ_AGENT_ADDITIONAL_JAVA_OPTS: 
rhq-agent.sh: RHQ_AGENT_CMDLINE_OPTS: --daemon 
rhq-agent.sh: LD_LIBRARY_PATH: /usr/local/rhq-agent/lib/augeas/lib
rhq-agent.sh: Executing the agent with this command line:
rhq-agent.sh: "/usr/local/jdk/bin/java" "-Djava.endorsed.dirs=/usr/local/rhq-agent/lib/endorsed" "-Djava.library.path=/usr/local/rhq-agent/lib" -Xms64m -Xmx128m -Djava.net.preferIPv4Stack=true  -Dlog4j.configuration=log4j-debug.xml -Di18nlog.dump-stack-traces=true -Dsigar.nativeLogging=true -cp "/usr/local/rhq-agent/conf:/usr/local/rhq-agent/lib/commons-io-1.4.jar:/usr/local/rhq-agent/lib/commons-logging-1.1.0.jboss.jar:/usr/local/rhq-agent/lib/concurrent-1.3.4-jboss-update1.jar:/usr/local/rhq-agent/lib/dom4j-1.6.jar:/usr/local/rhq-agent/lib/getopt-1.0.13.jar:/usr/local/rhq-agent/lib/i18nlog-1.0.10.jar:/usr/local/rhq-agent/lib/jboss-common-1.2.1.GA.jar:/usr/local/rhq-agent/lib/jboss-jmx-4.2.3.GA.jar:/usr/local/rhq-agent/lib/jboss-remoting-2.2.2.SP8.jar:/usr/local/rhq-agent/lib/jboss-serialization-1.0.3.GA.jar:/usr/local/rhq-agent/lib/jline-0.9.94.jar:/usr/local/rhq-agent/lib/log4j-1.2.16.jar:/usr/local/rhq-agent/lib/persistence-api-1.0.jar:/usr/local/rhq-agent/lib/rhq-common-drift-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-core-client-api-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-core-comm-api-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-core-domain-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-core-native-system-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-core-plugin-api-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-core-plugin-container-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-core-util-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-enterprise-agent-4.5.1.jar:/usr/local/rhq-agent/lib/rhq-enterprise-comm-4.5.1.jar:/usr/local/rhq-agent/lib/sigar-1.6.5.132-3.jar:/usr/local/jdk/lib/tools.jar" org.rhq.enterprise.agent.AgentMain --daemon 
rhq-agent.sh: /usr/local/rhq-agent/bin/rhq-agent.sh done.

what do i fix?

thnaks~