Imposible upgrade lenny to sid

[Guan de dio <guan.dedio@gmail.com>]

Hi all, 

    Currently I try to pass my Debian lenny to sid. During the packages configuration I always have the same error:

   Error to process:
      /var/cache/apt/archives/udev_151_1_i386.deb
  
    Is something break in the repositories?

    I try the dist-upgrade into and KDE sesion and in command line sesion with the same issue.

Best Regards,
GUAN