Logic Pro 9 Auto-Input Monitoring Not Working

This is probably a complete USER ERROR, but I've switched to Logic 9 from Pro Tools and I'm having trouble setting up a Pre-Roll. I set it up in the Recording Settings, but I'm not getting any audio on the track I'm recording to before it starts recording at my locate point. I don't understand at all. It's very cut and dry in PT so I get the concept, but still no audio.

Thanks so much!
Thanks for you reply. I'll give that a try. I've been experimenting with the auto punch turned on and will get sound every now and then, but not consistently when I hit record. It seems like I have to put the playhead a bar or two before the actual punch part to get the audio from the previous take to sound. I'll keep messing with it. Thanks again!