EmailListener plugin unstable

I use EmailListener plugin to relay all my email from gmail to my OpenFire IM but the plugin is so unstable and it is not functioning after like 3 hours or so.

My platform is:

OS: CentOS Linux 6.5

OpenFire version: 3.9.3

EmailListener version: LATEST (rpm package)

I did visit all the forums here and google but found no solution. Do you guys have any clue? Please drop me a line if you do.**
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