ERROR: Your message to the room bounced

Hi everyone!!,

finally i install the mu-conference ( 0.6.0 ) in the jabberd 1.4.4 but
any time i sent a message i received this messages "ERROR: Your
message to the room bounced",

Why its happends ? How can i send messages correctly ? i was googleing
but nothing concret at all about this.. im using exodus 0.9.1.0 .

I read a similar theard in the list, but doesnt help me... another idea ?

for another extra information  just ask me..

Regards!!

-- 
Take it easy
Guille