Nessus error - empty error

[saske <dmuniz () s21sec com>]

Hello.

I have some problem with Nessus in my LAN.
I run nessusd and nessus client in the same host.
I log on with my user and when I push Start inmediately it return the 
error "nessusd returned an empty error".
In Google are the same question of some people but I don find the solution.
My version of SO is Kubuntu and Nessus is 2.2.3
Some one can help me?

Thanks