Reset Report Manager

I've done something bad that prevents Report Manager from running. Every time I try to call it up in a browser, I get error messages complaining about a null object.

Is there a way to get the report manager to "start fresh"? For example, would deleting the entries in the catalog table do the trick.

Thanks for any help.

What exception do you see in the report server log file?|||

The log shows:

<Header>
<Product>Microsoft SQL Server Reporting Services Version 9.00.1399.00</Product>
<Locale>en-US</Locale>
<TimeZone>Eastern Daylight Time</TimeZone>
<Path>C:\Program Files\Microsoft SQL Server\MSSQL.2\Reporting Services\LogFiles\ReportServerWebApp__04_18_2006_07_52_53.log</Path>
<SystemName>MERCURY</SystemName>
<OSName>Microsoft Windows NT 5.2.3790 Service Pack 1</OSName>
<OSVersion>5.2.3790.65536</OSVersion>
</Header>
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing ReportBuilderTrustLevel to '0' as specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing MaxActiveReqForOneUser to '20' requests(s) as specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing MaxScheduleWait to default value of '1' second(s) because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing DatabaseQueryTimeout to default value of '30' second(s) because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing ProcessRecycleOptions to default value of '0' because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing RunningRequestsScavengerCycle to default value of '30' second(s) because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing RunningRequestsDbCycle to default value of '30' second(s) because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing RunningRequestsAge to default value of '30' second(s) because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing CleanupCycleMinutes to default value of '10' minute(s) because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing DailyCleanupMinuteOfDay to default value of '120' minutes since midnight because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing WatsonFlags to default value of '1064' because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing WatsonDumpOnExceptions to default value of 'Microsoft.ReportingServices.Diagnostics.Utilities.InternalCatalogException,Microsoft.ReportingServices.Modeling.InternalModelingException' because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing WatsonDumpExcludeIfContainsExceptions to default value of 'System.Data.SqlClient.SqlException,System.Threading.ThreadAbortException' because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing SecureConnectionLevel to default value of '1' because it was not specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing DisplayErrorLink to 'True' as specified in Configuration file.
w3wp!library!1!4/18/2006-07:52:54:: i INFO: Initializing WebServiceUseFileShareStorage to default value of 'False' because it was not specified in Configuration file.
w3wp!ui!1!4/18/2006-07:52:55:: Unhandled exception: System.NullReferenceException: Object reference not set to an instance of an object.
at Microsoft.ReportingServices.UI.GlobalApp.Application_AuthenticateRequest(Object sender, EventArgs e)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

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I found my problem.

I had authentication mode set to "None" in web.config. As soon as I changed it to "Windows" the problem went away.