Spamassassin and plesk 11.5.30 on ubuntu

[EmilN]

So we have plesk 11.5.20 installed on an ubuntu server.

We cant turn the spamassasin feature on, the button is greyed out.

Spamassassin is free in all other hosting platforms (virtualmin) etc. Why it would cost with paralleles is outside of my understanding.

So is spamassassin free in plesk or not? And how do we turn this on?