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我一直在尝试解决这个问题很长时间。当我解决一个问题时，会弹出另一个问题。我很确定我在最后一个障碍。

我有一个应用程序，我想在线提供给用户。单击即可启动它，它会从下载缓存中下载并运行。这是 Visual Studio 2010 ClickOnce 部署中的一个选项。

当我第一次通过 FTP 将文件上传到网络服务器时，我遇到了文件扩展名问题，网络服务器无法识别它们。我能够将正确的MIME类型添加到 htaccess 文件中，并且成功，应用程序几乎启动了..

我application cannot be started error对下面的细节也有同样的看法，

PLATFORM VERSION INFO
   Windows                     : 6.1.7601.65536 (Win32NT)
   Common Language Runtime     : 4.0.30319.296
   System.Deployment.dll       : 4.0.30319.1 (RTMRel.030319-0100)
   clr.dll                     : 4.0.30319.296 (RTMGDR.030319-2900)
   dfdll.dll                   : 4.0.30319.1 (RTMRel.030319-0100)
   dfshim.dll                  : 4.0.31106.0 (Main.031106-0000)

SOURCE
   Deployment url              : http://apps4you.comyr.com/appTest8 /Application%20Files/snake_1_0_0_6/snake.application
   Server                      : Apache

IDENTITIES
   Deployment Identity         : snake.application, Version=1.0.0.6,   Culture=neutral, PublicKeyToken=5bd57d3abffa2377, processorArchitecture=x86

APPLICATION SUMMARY
   * Online only application.
   * Trust url parameter is set.

ERROR SUMMARY
   Below is a summary of the errors, details of these errors are listed later in the log.
   * Activation of http://apps4you.comyr.com/appTest8/Application%20Files/snake_1_0_0_6/snake.application resulted in exception. Following failure messages were detected:
    + The remote server returned an error: (500) Internal Server Error.

COMPONENT STORE TRANSACTION FAILURE SUMMARY
   No transaction error was detected.

WARNINGS
   There were no warnings during this operation.

OPERATION PROGRESS STATUS
   * [27/04/2013 2:29:49 p.m.] : Activation of http://apps4you.comyr.com/appTest8/Application%20Files/snake_1_0_0_6/snake.application has started.
   * [27/04/2013 2:29:50 p.m.] : Processing of deployment manifest has successfully completed.
   * [27/04/2013 2:29:50 p.m.] : Installation of the application has started.

ERROR DETAILS
   Following errors were detected during this operation.
   * [27/04/2013 2:30:07 p.m.] System.Net.WebException
    - The remote server returned an error: (500) Internal Server Error.
    - Source: System
    - Stack trace:
        at System.Net.HttpWebRequest.GetResponse()
        at System.Xml.XmlDownloadManager.GetNonFileStream(Uri uri,    ICredentials credentials, IWebProxy proxy, RequestCachePolicy cachePolicy)
        at System.Xml.XmlUrlResolver.GetEntity(Uri absoluteUri, String   role, Type ofObjectToReturn)
        at System.Xml.XmlTextReaderImpl.OpenAndPush(Uri uri)
        at System.Xml.XmlTextReaderImpl.PushExternalEntityOrSubset(String publicId, String systemId, String baseUriStr, Uri& baseUri, String entityName)
        at System.Xml.XmlTextReaderImpl.DtdParserProxy_PushExternalSubset(String systemId, String publicId)
        at System.Xml.DtdParser.ParseExternalSubset()
        at System.Xml.DtdParser.Parse(Boolean saveInternalSubset)
        at System.Xml.DtdParser.System.Xml.IDtdParser.ParseInternalDtd(IDtdParserAdapter adapter, Boolean saveInternalSubset)
        at System.Xml.XmlTextReaderImpl.ParseDtd()
        at System.Xml.XmlTextReaderImpl.ParseDoctypeDecl()
        at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
        at System.Deployment.Application.ManifestValidatingReader.XmlFilteredReader.Read()
        at System.Xml.XmlCharCheckingReader.Read()
        at System.Xml.XsdValidatingReader.Read()
        at System.Deployment.Application.ManifestReader.FromDocument(String localPath, ManifestType manifestType, Uri sourceUri)
        at System.Deployment.Application.DownloadManager.DownloadApplicationManifest(AssemblyManifest deploymentManifest, String targetDir, Uri deploymentUri, IDownloadNotification notification, DownloadOptions options, Uri& appSourceUri, String& appManifestPath)
        at System.Deployment.Application.DownloadManager.DownloadApplicationManifest(AssemblyManifest deploymentManifest, String targetDir, Uri deploymentUri, Uri& appSourceUri, String& appManifestPath)
        at System.Deployment.Application.ApplicationActivator.DownloadApplication(SubscriptionState subState, ActivationDescription actDesc, Int64 transactionId, TempDirectory& downloadTemp)
        at System.Deployment.Application.ApplicationActivator.InstallApplication(SubscriptionState& subState, ActivationDescription actDesc)
        at System.Deployment.Application.ApplicationActivator.PerformDeploymentActivation(Uri activationUri, Boolean isShortcut, String textualSubId, String deploymentProviderUrlFromExtension, BrowserSettings browserSettings, String& errorPageUrl)
        at System.Deployment.Application.ApplicationActivator.ActivateDeploymentWorker(Object state)

COMPONENT STORE TRANSACTION DETAILS
   No transaction information is available.

因此，该应用程序的启动看起来很有希望，但它仍然不存在。这个内部服务器错误（500）可能是什么？我做了一些研究，它似乎很笼统。堆栈跟踪中的详细信息是什么意思？

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