Error. Nessusd returned an empty report

[Massimiliano.Sorrentino at na.infn.it]

Dear all,
	I compiled nessus-2.0.12 on my GNU/Linux system wich I build from 
scratch. I added a nessus-account and then started the daemon nessusd.
I can login from any host of my LAN (also from the nessus server 
host) but I can scan only the nessus server host.
	When I try to scan any other host I suddenly get this window

	------------------------------------------------
	|Error						|
	|-----------------------------------------------|
	|						|
	|	nessusd returned an empty status	|
	|						|
	------------------------------------------------  

Please, can someone help me?
Thanks in advance
Massimiliano