2
most likely u haven't copied the corefiles correctly..
i made a note in the comments on the invisionboard module regarding ipb..
i'll repeat them here..
IPB is very version dependant, this means that if it says it is for XOOPS 2.0.9.2 then it will only work correctly with XOOPS 2.0.9.2. 1.4Ga is for XOOPS 2.0.9.2 and will not work right using 2.0.10, for 2.0.10 you will need the updated core modules. see bbpixel.com forum for those, i posted them the same day as 2.0.10 was released..
note: the current version 1.4H is still using 2.0.9.2 core files as there was a mistake in the update, so you will still need the core update pack from bbpixel.com
just search or look for the topic 1.4g core update for XOOPS 2010, follow the instructions..