我正在开发一个基于 Web 的 ASP.NET 应用程序，并且我正在使用 Telerik 工具。即使在我公司的生产服务器中也一切正常。现在，我们有另一个服务器，我们用它来测试我们正在开发的基于 Web 的应用程序。我将我的应用程序（包括它的数据库）从生产服务器复制到了这个测试服务器，但它在它上面运行不佳。它打开了网站，但数据库中没有数据，我不知道为什么？我connectionstring在 web.config 文件中有，我在生产服务器中有相同的东西，但仍然没有数据。
我没有更改应用程序中的任何内容，我使用的是 .NET 4，它安装在两台服务器中。一切都是一样的，但我不知道为什么我会收到这个错误。你有解决这个问题的办法吗？
为什么应用程序在第一台服务器上工作，而在第二台服务器上却不工作？
我的 web.config 文件是：
<configuration>
<connectionStrings>
<add connectionString="Data Source=localhost\sqlexpress;Initial Catalog=PMODServices;Integrated Security=True" name="PMODServicesConnectionString" providerName="System.Data.SqlClient" />
</connectionStrings>
<system.web>
<customErrors mode="Off" />
<compilation debug="true" targetFramework="4.0">
<assemblies>
<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Speech, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<add assembly="System.Runtime.Serialization, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Xml.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="System.Data.DataSetExtensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<add assembly="Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
<add assembly="Microsoft.ReportViewer.Common, Version=10.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
<add assembly="Microsoft.Build.Framework, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
<add assembly="System.Management, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
<!-- <add assembly="office, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71E9BCE111E9429C"/> -->
<add assembly="stdole, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /></assemblies>
<buildProviders>
<add extension=".rdlc" type="Microsoft.Reporting.RdlBuildProvider, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</buildProviders>
</compilation>
<httpHandlers>
<!-- <add path="Telerik.Web.UI.WebResource.axd" verb="*" type="Telerik.Web.UI.WebResource" validate="false" />-->
<add path="Telerik.Web.UI.WebResource.axd" verb="*" type="Telerik.Web.UI.WebResource, Telerik.Web.UI" validate="false" />
<add path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler" validate="false" />
<add path="Telerik.Web.UI.SpellCheckHandler.axd" verb="*" type="Telerik.Web.UI.SpellCheckHandler" validate="false" />
<add path="Telerik.Web.UI.DialogHandler.aspx" verb="*" type="Telerik.Web.UI.DialogHandler" validate="false" />
<add path="Telerik.RadUploadProgressHandler.ashx" verb="*" type="Telerik.Web.UI.RadUploadProgressHandler" validate="false" />
<add path="Reserved.ReportViewerWebControl.axd" verb="*" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" validate="false" />
</httpHandlers>
<authentication mode="Windows"/>
<pages>
<controls>
<add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI" />
</controls>
</pages>
<httpModules>
<add name="RadUploadModule" type="Telerik.Web.UI.RadUploadHttpModule" />
<add name="RadCompression" type="Telerik.Web.UI.RadCompression" />
</httpModules>
</system.web>
<location path="Users/Telerik.Web.UI.WebResource.axd">
<system.web>
<authorization>
<allow users="*"/>
</authorization>
</system.web>
</location>
<location path="Telerik.Web.UI.WebResource.axd">
<system.web>
<authorization>
<allow users="*"/>
</authorization>
</system.web>
</location>
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<handlers>
<remove name="ChartImage_axd" />
<remove name="Telerik_Web_UI_SpellCheckHandler_axd" />
<remove name="Telerik_Web_UI_DialogHandler_aspx" />
<remove name="Telerik_RadUploadProgressHandler_ashx" />
<remove name="Telerik_Web_UI_WebResource_axd" />
<add name="Telerik_Web_UI_WebResource_axd" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" preCondition="integratedMode" />
<add name="ChartImage_axd" path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" verb="*" preCondition="integratedMode" />
<add name="Telerik_Web_UI_SpellCheckHandler_axd" path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler" verb="*" preCondition="integratedMode" />
<add name="Telerik_Web_UI_DialogHandler_aspx" path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler" verb="*" preCondition="integratedMode" />
<add name="Telerik_RadUploadProgressHandler_ashx" path="Telerik.RadUploadProgressHandler.ashx" type="Telerik.Web.UI.RadUploadProgressHandler" verb="*" preCondition="integratedMode" />
<add name="ReportViewerWebControlHandler" preCondition="integratedMode" verb="*" path="Reserved.ReportViewerWebControl.axd" type="Microsoft.Reporting.WebForms.HttpHandler, Microsoft.ReportViewer.WebForms, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
</handlers>
<modules runAllManagedModulesForAllRequests="true">
<remove name="RadUploadModule" />
<remove name="RadCompression" />
<add name="RadUploadModule" type="Telerik.Web.UI.RadUploadHttpModule" preCondition="integratedMode" />
<add name="RadCompression" type="Telerik.Web.UI.RadCompression" preCondition="integratedMode" />
</modules>
</system.webServer>
<appSettings>
<add key="Telerik.ScriptManager.TelerikCdn" value="Enabled" />
<add key="Telerik.StyleSheetManager.TelerikCdn" value="Enabled" />
</appSettings>
</configuration>