Iomega REV 120gb SATA Internal

Hi I am having problems with Iomega REV 120gb SATA drive, do the copy in the Iomega drive, but when it finishes copying Acronis True Image 2015 eject the disc and is a problem because the drive does not have until I put it back again but light at the end of the backup it back out

I have Windows 8.1 Pro

thank you very much