Plugins problems with CoD 2

Hi all,
I have a CoD 2 server where i tested some Gsm plugins and discovered some plugins work bad and others don't work.
This is the list of the plugins that i have tested running GSM in my own pc to a third-party gameserver:

- censor Don't work
- killmessages Works bad (I notice with some players works without problems with others don't works)
- pingchecker Don't work
- welcomemessages Works bad. (I notice with some players works without problems with others don't works)

Each plugin.json or only gsm logfile?