Report Builder: Error 401

I'm looking for some help/suggestions on how to solve an authentication problem we're having running the ad-hoc reporting tool (Report Builder). Here's the background:

1. It actually installs a client footprint the first time it is launched, and requires .NET 2.0 framework on the client. Authentication to the Report Server is through Windows NT authentication, then additional Reporting Service security controls what rights the accounts have (including the right to use Report Builder).

2. Currently, Windows NT authentication works for providing access to the Report Server, running reports published to the server, and doing other admin functions related to Reporting Services.

3. We are having a problem with accounts not being able to run Report Builder even though they have the correct rights, and it appears to be related to the specific PC being used. Serveral of us have accounts that used to work on our PCs, but no longer work. But the same account will work when used on another PC (which was actually in the same DNR subnet). I've also had someone use my account on their machine, and it worked. We've had others that have never been able to run Report Builder, even though they have the rights to do so. Bellow are error details returned to the client when trying to run the application.

4. Since the problem seems to be machine related and one of the client requirements is the .NET 2.0 framework, I tried un-installing and re-installing this, but it didn't correct the problem.

5. This problem occurs both on both the development server and the new server we will be using for production.

Not sure what to do next...any ideas? Would a network trace help? Or is there any additional info on the Report Server log that would help? Microsoft support?

Let me know what you think, or if you think there are others that might be able to help.

ERROR DETAILS:

PLATFORM VERSION INFO

Windows : 5.1.2600.131072 (Win32NT)

Common Language Runtime : 2.0.50727.42

System.Deployment.dll : 2.0.50727.42 (RTM.050727-4200)

mscorwks.dll : 2.0.50727.42 (RTM.050727-4200)

dfdll.dll : 2.0.50727.42 (RTM.050727-4200)

dfshim.dll : 2.0.50727.42 (RTM.050727-4200)

SOURCES

Deployment url : http://216.159.162.212/ReportServer/ReportBuilder/ReportBuilder.application

ERROR SUMMARY

Below is a summary of the errors, details of these errors are listed later in the log.

* Activation of http://216.159.162.212/ReportServer/ReportBuilder/ReportBuilder.application resulted in exception. Following failure messages were detected:

+ Downloading http://216.159.162.212/ReportServer/ReportBuilder/ReportBuilder.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

* [8/3/2006 10:01:12 AM] : Activation of http://216.159.162.212/ReportServer/ReportBuilder/ReportBuilder.application has started.

ERROR DETAILS

Following errors were detected during this operation.

* [8/3/2006 10:01:12 AM] System.Deployment.Application.DeploymentDownloadException (Unknown subtype)

- Downloading http://216.159.162.212/ReportServer/ReportBuilder/ReportBuilder.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)

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.

Did you ever figure this out? we are getting the same errors.