Well that didn't work-ranged staff and stealth bow mods

I installed both, and was looking forward to a run with those very nice new weapons. Went to WK first thing in chapter2, only to find some item with a staff icon and a stealth longbow description. And headgear without description and with names that suggested that something was wrong.
Did I do something wrong? Or do these mods always bite eachother? Or do I need some specific version of BG2EE?
Right now I'm not too happy, was really looking forward to using these pretties.
Oh well, back to reading books I suppose.