Problema com o nessus

[andunno]

Boa tarde pessoal.

Acabei de instalar o nessus, porém quando eu executo:

#nessus-mkcert

aparece a seguinte mensagem:

/usr/local/sbin/nessusd: error while loading shared libraries: libnasl.so.2: cannot open shared object file: No such file or directory

Executing nessusd failed. Make sure your library loader is configured properly

and that nessusd is in your $PATH

Estou utilizando o CentOS 4.3.