2
should have read all the warnings and istructions.
x-ipb info is all available on
http://www.bbpixel.commany topics on xoops.org regarding compatibility with XOOPS 2.2 aswell
the short answer is, they don't work together.. x-ipb has always been version specific. in essence when you update xoops, u have to update x-ipb too.. if there isnt an update available for x-ipb then don't update xoops.
x-ipb 1.4I is latest stable version and is for XOOPS 2.0.13.1
x-ipb 1.5 is for XOOPS 2.2 but neither XOOPS 2.2 or x-ipb are considered stable enough for production site use.. and x-ipb 1.5 does have issues at the moment.
another thing, when you upgrade, always test your upgrades 1st on a test site.. never upgrade your live website until you are sure everything will work on it..