If the app is running on an emulator, you see it automatically in DDMS.
If the app is running on a device connected to your development machine, you will only see it in DDMS if the <application/> element in AndroidManifest.xml has the android:debuggable="true" attribute.
You can set that attribute using just tiapp.xml. Make the <android/> section of tiapp.xml look like this:
<android xmlns:android="http://schemas.android.com/apk/res/android">