What to do when you can't find the ID

[Nayoyo]

I've found that there's an ITEM ID clash in my modpack, and i'm not exactly sure how to go about fixing it since these items aren't showing up in a config file. (which i've noticed pretty much only shows BLOCKS)

how would I go about fixing the item ids to stop getting (invalid item (Destroy))

 

Full explaination: Ars Magica 2 and Thermal Expansion keep giving me the above invalid item whenever i mine an Ars Magica 2 ore. My first thought was "Okay, it's just an ID conflict that wasn't announced. Let me go check the config and switch them around." but the items themselves aren't showing up in the config at all.

 

I have posted on the AM2 post on minecraft.com, but I figured someone here might have some helpful knowledge for me as well.

Edited June 12, 2014 by Nayoyo