Problem sending messages with clients

Hey ya all,

I've got wildfire installed in my server.
But latelly I've noticed that some users are sending
messages through  
clients and these messages aren't being delivered to the
supposed  
recipient and I got no messages saying if it was delivered
or not. The  
message simply disappears through the net.
Does anyone figure out what can be happening?
I've got a 1 MB RAM memory in a Debian Sarge server with a
40 MB HD drive


-- 
Antonio Thomás M. K. Oliveira
Analista de Sistema - Prefeitura Municipal de Itajubá
http://www.itajuba.mg.go
v.br
Tel. (35) 3692.1731







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