求教！windows7 64位下出现的问题

以前我们客户端的操作系统是XP 32位的，现在客户端的操作系统要升级到windows7 64位的
测试的时候出现的问题
PLATFORM VERSION INFO
Windows  : 6.1.7600.0 (Win32NT)
Common Language Runtime  : 2.0.50727.4927
System.Deployment.dll  : 2.0.50727.4927 (NetFXspW7.050727-4900)
mscorwks.dll  : 2.0.50727.4927 (NetFXspW7.050727-4900)
dfdll.dll  : 2.0.50727.4927 (NetFXspW7.050727-4900)
dfshim.dll  : 2.0.50727.4927 (NetFXspW7.050727-4900)SOURCES
Deployment url : http://**/**/**.applicationERROR SUMMARY
Below is a summary of the errors, details of these errors are listed later in the log.
* Activation of http://**/**/**.application resulted in exception. Following failure messages were detected:
+ Downloading http://**/**/**.application did not succeed.
+ The remote server returned an error: (401) Unauthorized.COMPONENT STORE TRANSACTION FAILURE SUMMARY
No transaction error was detected.WARNINGS
There were no warnings during this operation.OPERATION PROGRESS STATUS
* [4/24/2011 8:06:02 PM] : Activation of http://**/**/**.application has started.ERROR DETAILS
Following errors were detected during this operation.
* [4/24/2011 8:06:02 PM] System.Deployment.Application.DeploymentDownloadException (Unknown subtype)
- Downloading http://**/**/**.application 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.DownloadManifestAsRawFile(Uri& sourceUri, String targetPath, IDownloadNotification notification, DownloadOptions options, ServerInformation& serverInformation)
at System.Deployment.Application.DownloadManager.DownloadDeploymentManifestDirectBypass(SubscriptionStore subStore, Uri& sourceUri, TempFile& tempFile, SubscriptionState& subState, IDownloadNotification notification, DownloadOptions options, ServerInformation& serverInformation)
at System.Deployment.Application.DownloadManager.DownloadDeploymentManifestBypass(SubscriptionStore subStore, Uri& sourceUri, TempFile& tempFile, SubscriptionState& subState, IDownloadNotification notification, DownloadOptions options)
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: (401) Unauthorized.
- Source: System
- Stack trace:
at System.Net.HttpWebRequest.GetResponse()
at System.Deployment.Application.SystemNetDownloader.DownloadSingleFile(DownloadQueueItem next)COMPONENT STORE TRANSACTION DETAILS
No transaction information is available.这是为什么啊？？？
求高手指点！！！