manage plugin problem

[kaunos]

Hi All,

i am working witch cacti 0.8.8a on linux server. i have 500 switches and everything is fine. i use manage plug-in version 0.6.2.

when any devices goes down, manage plug-in send me e-mail. thats fine also.

but sometimes when manage plug-in send me e-mail, i checked that host. everthings OK. cacti shows up status and i reach a host via ssh, http etc.

when i click devices and host status in cacti panel, under manage section, seems host is down. but i can still reach a host.

after 5 minutes later, manage plug-in send me e-mail again and host status is UP.
but host is never DOWN.

any ideas?

thank you so much...