Error Type: system.deployment.application.deploymentdownloadexception unknown subtype in clickonce application.

Recently i have worked with .NET ClickOnce application, in that we published the application and deployed on IIS6.0, every thing working well in IIS6.0. But client changed server and now IIS is 7.5 ,after placing files on IIS7.5 we are unable to download .sdf file from bin folder.

we are getting the following error
ERROR DETAILS
Following errors were detected during this operation.
* [9/10/2013 1:56:27 PM] System.Deployment.Application.DeploymentDownloadException (Unknown subtype)
- Downloading http://xxx/Application Files/versionnumber/bin/Debug/yyy_ce.sdf.deploy did not succeed.
- Source: System.Deployment
- Stack trace:
at System.Deployment.Application.SystemNetDownloader.DownloadSingleFile(DownloadQueueItem next)
at System.Deployment.Application.SystemNetDownloader.DownloadAllFiles()
at System.Deployment.Application.FileDownloader.Download(SubscriptionState subState)
at System.Deployment.Application.DownloadManager.DownloadDependencies(SubscriptionState subState, AssemblyManifest deployManifest, AssemblyManifest appManifest, Uri sourceUriBase, String targetDirectory, String group, IDownloadNotification notification, DownloadOptions options)
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)
--- Inner Exception ---
System.Net.WebException
- The remote server returned an error: (404) Not Found.
- Source: System
- Stack trace:
at System.Net.HttpWebRequest.GetResponse()
at System.Deployment.Application.SystemNetDownloader.DownloadSingleFile(DownloadQueueItem next)

I have tried to solve this problem almost a day but i couldn't.
IIS7.5 is wouldn't allow to view or access file from bin folder.
Hidden Segments used to specifies that certain segments of URLs can be made inaccessible to clients.
So, Finally i just removed bin folder from Hidden Segments in Request Filtering setting from that website on IIS7.5.

After removing that folder from hidden segments, application is able to download .sdf file from server.

Reference: http://weblogs.asp.net/owscott/archive/2008/03/05/iis7-blocks-viewing-access-to-files-in-bin-and-other-asp-net-folders.aspx

and 

http://msdn.microsoft.com/en-us/library/ms690411(v=vs.90).aspx