Won't share to iDVD

I'm taking a movie that I made in FCP X over to GarageBand to mark chapters, something I've done numerous times. After I've marked the chapters, I'm trying to share the project from GarageBand over to iDVD (again, something I've done numerous times) except for whatever reason this time, GarageBand won't send the movie over to iDVD now. I'll click on Share>Send Movie to iDVD then the share monitor will pop up and instantaneously disappear as if the project has ben sent to iDVD, but no such luck. Any suggestions?

Thanks.