Question [Q] Modifying APK files. Why won't "apktool" recompile?

Modifying Mms.apk. I installed Java, and used the following command to decompile the .apk:
apktool.jar d Mms.apk

I then made my changes, and am trying to recompile with the command:
apktool.jar b Mms Mms.apk

The guides I'm following say this will create a "dist" folder within the Mms folder, containing the new (but unsigned) .apk file. This doesn't happen.
No output is given in Command Prompt.

A "build" folder is created, however. Inside is an "apk" folder. Inside of that is a "classes.dex" file.

Why won't apktool create the dist folder?
How can I get the recompiled apk file?