Changing item description with WeiDU

Hi all,

I recently decided to try my hands on some item creation for BG2:EE, and I've found numerous helpfull guides around the interwebs. I've been pretty successful so far, managed to create an item and see it ingame, but I hit a wall when I try to change item description. I've tried to use WeiDU, and been following a guide where it says to create a textfile, rename it, rename WeiDU.exe and then its should work. But when I try I get an a msg in a DOS window saying:

(SETUP-ITEMTUTORIAL.EXE.DEBUG) Queried (pid= -1)

and the item description doesn't show ingame. Anyone know what the problem is? Or how to fix it?
I've been using the guide found here: http://forums.rpgdungeon.net/index.php?topic=1847.0;wap2

Please help, getting pretty frustrated :)