hpux chaning the IP address oninit hung

Dear all I have one oninit problem. After changeing HPUX 11.11 servre ip address by edit /etc/rc.config.d/netconf and /etc/hosts entry add new IP mapping hostname. Then use /sbin/init.d/net command to restart hpux network. After change new IP we start online,it always stop after Initializing rhead structure...succeeded.But when we change IP with reboot HPUX,it is can onint to On-Line Mode. Can anyone know why ? Online server can't change ip bypass OS reboot ?? ---------------------------------------------------------------------log server:/users/informix> oninit -v Checking group membership to determine server run mode...succeeded Reading configuration file '/mes/infor10.0/etc/onconDRPRODLCDD'...succeeded Creating /INFORMIXTMP/.infxdirs...succeeded Creating infos file "/mes/infor10.0/etc/.infos.drprodlcdd"...succeeded Linking conf file "/mes/infor10.0/etc/.conf.drprodlcdd"...succeeded Writing to infos file...succeeded Checking config parameters...succeeded Allocating and attaching to shared memory...succeeded Creating resident pool 258866 kbytes...succeeded Allocating 400016 kbytes for buffer pool of 2K page size...succeeded Initializing rhead structure...succeeded