Can't start webconsole after install ?

Can't start webconsole after install ?

I have installed  ManageEngine_ApplicationsManager_64bit.bin  on my server  and following the guide in web site but i can't start this website  
when i start and see this warning 
[root@appmanager AppManager12]# ./startWebConsole.sh
java.net.UnknownHostException: appmanager: appmanager: Temporary failure in name resolution
        at java.net.InetAddress.getLocalHost(Unknown Source)
        at com.adventnet.appmanager.utils.StartWebConsole.main(StartWebConsole.java:239)
Caused by: java.net.UnknownHostException: appmanager: Temporary failure in name resolution
        at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
        at java.net.InetAddress$1.lookupAllHostAddr(Unknown Source)
        at java.net.InetAddress.getAddressesFromNameService(Unknown Source)
        ... 2 more
webserverport=9090
some one can help me to resolve this error .pls and thank you