7
Hmm it seems like there are a lot of work still to be done with newbb 4.0 as this is still just a release candidate.
Try to fall back to the prior version 3.08
https://xoops.org/modules/repository/visit.php?cid=20&lid=1672
And if this doesn't work I can recomend the newbbex 1.4 module (use it myself) I haven't found any big bugs with this yet :)
Programming is like sex:
One mistake and you have to support it for the rest of your life.