For some reason the dialogue I have attached to a character is not working. I made sure I have GetIsID and GetStage is all set appropriately, but when I try to talk to her all I get is the generic stuff like, "need something?"

Did you make the quest containing your dialogue start-game-enabled? Did you generate a SEQ file for your quest?

How do I go about making an SEQ file?

Download TES5Edit: http://skyrim.nexusmods.com/mods/25859/

Load your mod (Double click it when you open the program), wait for it to load, then right click your plugin name, then click Other > Generate SEQ. It should make it for you, and you're good to go.

Without a SEQ your start-enabled-quest wont actually start up properly. If you destribute your mod, remember to include the SEQ file.