See: http://www.saros-project.org/saros-for-intellij
The documentation says: Modules have to be one level below the project root to be recognized by Saros/I.
So far so good, but the next paragraph mention projects. This seems to be a C&P mistake. Projects in IntelliJ are equal to a Eclipse Workspace.
Solution: replace project(s) with module(s).
The documentation on the linked page no longer contains conflicting usages of module and project.