AutoCAD2006怎么不能安装

偶在网上下载了AutoCAD2006简体中文版，先后换了两个地址下载的，可总是不能安装，老弹出下面对话框，请问到底是怎么回事呀




[1/30/2008 19:29:50] === Installation started on HBZY-88701E7B78 by Gguest ===
[1/30/2008 19:29:51] [Info] Windows Installer upgrade is not required

[1/30/2008 19:29:51]  System Version = 3.1.4000.2435
[1/30/2008 19:29:51] Installation skipped: MSI Runtime 3.0
[1/30/2008 19:29:51] [Info] .NET Framework Runtime upgrade is not required
[1/30/2008 19:29:51]  System Version = 2.0.50727.42
[1/30/2008 19:29:51] Installation skipped: .NET Framework Runtime 1.1
[1/30/2008 19:29:51] Installation started: .NET Framework Runtime 1.1 Language Pack
[1/30/2008 19:29:51]  Command = "I:\Bin\AcadFEUI\support\dotnetfx\chs\langpack.exe" /q:a /c:"inst /qb"
[1/30/2008 19:29:58] [Error: 1603] 安装时发生严重错误
[1/30/2008 19:29:58] Installation failed: .NET Framework Runtime 1.1 Language Pack
[1/30/2008 19:29:58] Installation aborted
[1/30/2008 19:30:00] === Installation ended ===