aptitude failed to install fglrx-driver on unstable

[Romain JACQUET <romain.jacquet.dev@free.fr>]

When I try a "aptitude install fglrx-driver", aptitude claims that there 
is no candidate version!

aptitude  install fglrx-driver
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
Building tag database... Done
No candidate version found for fglrx-driver
No candidate version found for fglrx-driver
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B of archives. After unpacking 0B will be used.
Writing extended state information... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading extended state information
Initializing package states... Done
Building tag database... Done

aptitude  why fglrx-driver
No justification for fglrx-driver could be constructed.

aptitude show fglrx-driver|grep Version
Version: 8.43.2-1


I really do not understand. Any solutions to install fglrx-driver?

Thanks in advance.