Gossip 1.0 add on and Plone 3.3.1

[little spider]

Hi people
My add on product intallation failed. I'm following the troubleshouting but now I can't understand my error!!

First in my log file I saw "No module named CMFCorePermissions" and I foun in this forum to modify the string CMFCorePermissions to permissions.

But now I see "No module named migrate" and I cant find the solution.

Is it possible to install Gossip 1.0 in Plone 3.3.1?

Thanks