More Wadauthor texture madness

I decided I wanted to try out zdoom's ability to use a flat as a texture (or any graphic for that matter). As the subject line suggests, I'm using wadauthor.

According to Nanami, all I have to do is type in the name of the flat, ignore WA's complaints, and everything should work as planned. Instead all I get is ASHWALL2 >:|

Am I doing something wrong? Am I supposed to type it in a certain way? Is it just WA automatically "fixing" the "error"? Is Nanami a big liar?

Im using 47i, btw.

is that even implemented in 47i? i was under the impression it wasn't.

According to what I've read, it is.

It isn't, I tried randy's example wad showing that off with 47i and it didn't work.