4
Is it a fresh installation, or did you upgrade an existing installation?
If you've updated, did you also update the PM Module?
When you say, it "never worked before", please define "before": was it from the time you've installed the system, or was it after you you've updated it (if this is an updated installation)
Again, we need the steps you did to understand better, otherwise we're just guessing.
My guess is that you've updated your existing installation to XOOPS 2.3.3, but didn't update the PM module in the Admin.