Pour insatlation de l'autocad

Bonjour, l'or l'instalation de l'autocad j'ai eu un probleme l'erreur est chiffrer 1603
voila tout le rapport d'erreur
[3/16/2008 17:08:48] [Info] Windows Installer upgrade is not required
[3/16/2008 17:08:48] System Version = 3.1.4000.4039
[3/16/2008 17:08:48] Installation skipped: MSI Runtime 3.0
[3/16/2008 17:08:48] [Info] .NET Framework Runtime upgrade is not required
[3/16/2008 17:08:48] System Version = 2.0.50727.42
[3/16/2008 17:08:48] Installation skipped: .NET Framework Runtime 1.1
[3/16/2008 17:08:48] Installation started: .NET Framework Runtime 1.1 Language Pack
[3/16/2008 17:08:48] Command = "G:\Autocad 2006 ISO - FR\Bin\AcadFEUI\support\dotnetfx\fra\langpack.exe" /q:a /c:"inst /qb"
[3/16/2008 17:08:49] [Error: 1603] Erreur irrécupérable lors de l'installation.
[3/16/2008 17:08:49] Installation failed: .NET Framework Runtime 1.1 Language Pack
[3/16/2008 17:08:49] Installation aborted
[3/16/2008 17:08:59] === Installation ended ===