Web tools 2007 installer

Question

I'm trying to install Web Tools installer 2007 on the server (windows 2003 R2 x64) and when I get to Installing Wedfiles on the screen Installation Tasks. I get following error:
See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.
Exception Text **************
System.BadImageFormatException: Could not load file or assembly 'ChilkatDotNet2, Version=7.7.2379.17467, Culture=neutral, PublicKeyToken=eb5fc1fc52ef09bd' or one of its dependencies. An attempt was made to load a program with an incorrect format.
File name: 'ChilkatDotNet2, Version=7.7.2379.17467, Culture=neutral, PublicKeyToken=eb5fc1fc52ef09bd'
   at Installer.Utilities.Compression..ctor()
   at Installer.Workers.FileWorker..ctor()
   at Installer.Workers.FileWorker..ctor(Instance inst)
   at Installer.Install.dw_RunWorkerCompleted(Object sender, RunWorkerCompletedEventArgs e)
WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
Loaded Assemblies **************
mscorlib
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll
Installer
    Assembly Version: 2007.0.620.35237
    Win32 Version: 2007.0.620.0
    CodeBase: file:///C:/Program%20Files%20(x86)/SAP/SAP%20Business%20One%20Web%20Tools/Installer/Installer.exe
System.Windows.Forms
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
System
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
System.Drawing
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
System.Xml
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Xml/2.0.0.0__b77a5c561934e089/System.Xml.dll
System.ServiceProcess
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.42 (RTM.050727-4200)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.ServiceProcess/2.0.0.0__b03f5f7f11d50a3a/System.ServiceProcess.dll
Accessibility
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.42 (RTM.050727-4200)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/Accessibility/2.0.0.0__b03f5f7f11d50a3a/Accessibility.dll
System.Data
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_64/System.Data/2.0.0.0__b77a5c561934e089/System.Data.dll
System.Configuration
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_MSIL/System.Configuration/2.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll
System.Transactions
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_64/System.Transactions/2.0.0.0__b77a5c561934e089/System.Transactions.dll
System.EnterpriseServices
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.832 (QFE.050727-8300)
    CodeBase: file:///C:/WINDOWS/assembly/GAC_64/System.EnterpriseServices/2.0.0.0__b03f5f7f11d50a3a/System.EnterpriseServices.dll
JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.
For example:
<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>
When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

Answer 1

FYI this is what SAP sent me
We did some research on the BadImageFormatException and found that this
is .NET 3.0 framework error.
Webtools was built on .NET 2.0 and while 3.0 is supposed to be backward
compatible, it may be that the Chilkat component is not.
If you have installed the .NET 3.0, please try downgrading the .NET
framework to 2.0 to check if you that solves the issue.
Should you consider this issue as completed, I kindly ask you to
confirm this message at your earliest convenience.