经常碰到32位的DLL什么的不能在64位Windows的IIS上调用，在网上找到这篇文章也许能够解决很多问题。总的思路就是先允许IIS支持32位程序，然后再用.Net Framework注册IIS。
Enable 32-bit Server Applications on 64-bit Machines
ASP.NET applications that use TX Text Control .NET Server must be compiled for 32-bit platforms (see this article). IIS must be configured to execute these 32-bit applications. Generally, all applications will be executed in 64-bit mode.
1. Enable IIS's 32-bit support
Open a command prompt and type in the following command:
cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 1
This command enables the 32-bit mode in IIS.
2. Install the IIS 32-bit extensions
Open a command prompt and type the following command:
%SYSTEMROOT%\Microsoft.NET\Framework\v2.0.50727\aspnet_regiis.exe -i
This command installs the 32-bit web extensions for .NET Framework 2.0.
3. Activate .NET Framework 2.0 32-bit in IIS
In the IIS-Manager, select the 'ASP.NET v2.0.50727 (32bit)' in the 'Web Service Extensions' panel and check 'allow' to activate it.
4. Restart the IIS by opening a command prompt:
iisrestart