安装2.0 时，出现如下问题，望高人指点。
Server Error in '/forum' Application.
--------------------------------------------------------------------------------

Configuration Error
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: Could not load file or assembly 'Discuz.Forum' or one of its dependencies. 系统找不到指定的文件。 (C:\Inetpub\wwwroot\web.config line 57)

Source Error:


Line 55:    -->
Line 56:    <httpModules>
Line 57:        <add type="Discuz.Forum.HttpModule, Discuz.Forum" name="HttpModule" />
Line 58:    </httpModules>
Line 59:


Source File: C:\Inetpub\wwwroot\web.config    Line: 57


--------------------------------------------------------------------------------
Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42