Graph cannot update after change IP

[mantus]

Dear forum,
I just change my existing device which graphed in my cacti to other ip
bu suddenly my graph cannot update.

I tried to rebuild poller cached but still it's not work.
What should I do ?
my cacti version 0.8.7d

Thanks

[BSOD2600]

You know the new ip/device is functional? Follow this why its broken: http://docs.cacti.net/manual:087:4_help ... #debugging