Error when I try to import a boot image

Hi guys,

I have SCCM 2012 SP 1 updated.

I delete all boot image from library and I try to import anther boot.wim from original dvd.

Error: Data Source Information
•	Source location: \\xxx\sccm image\X17-24269\sources\boot.wim
•	Boot Image: 1 - Microsoft Windows PE (x64)
 
  Error: Package Information
•	Name: boot
 
  Error: Errors
•	You can not import this boot image. Only finalized boot images are supported. For more information press F1.

Any idea's ?

Thanks.