Cacti - No Graph on Interfaces

[wizzkid]

Hi Guys

I am maintaining a cacti monitoing server with 10 least 8 switches being monitored. Last night, I noticed that one of the switch Juniper EX4200 stopped updating the graph on interfaces but still updating the graph of CPU and memory of the switch.I removed/ delete the interface and add it again, but still the same - its not updating the interface graph, and when I click the graph the traffic is 0, where it fact the the switch has traffic on it. And I didn't change anything on both switch and cacti server

Other juniper on my network is being graphed by Cacti without issues.

Hope you can will be able to help me fix this issue.

Thanks.