uploading mp4 video problem

"One or more settings are unsupported. Open the file in QuickTime Player and export a new file." This is the error message I get when I try to bring a video into iBook author. I have tried different ones ranging from 2 minutes to 20 minutes with same problem. I opened them in quicktime as suggested and tried to export to itunes. However, the option "IPad, I phone 4 and Apple TV is whited out and says "Not Available."

Is there a fix anyone knows?

Thanks,

Tom