The Hideous Birdchild

I can't seem to get the Black City / White Forest inhabitant modifier codes in this file to work. My firmware is upgraded, and other codes in this file work just fine; I have checked and I am using the codes for my version (White). Does anybody know what's wrong and how I can fix it? I believe it may be that I've never used the Entralink before, but I really don't know for sure.