Report connection fails with DNS name

Hi,

I am facing problem while setting connection string in Report Service project.
Problem is when I specify DNS name instead of machine name as the Server in the connection string.

When I specify DNS name in the connection string it gives error that "A connection cannot be made.Ensure that the server is running" on click of "Test Connection"
Also I am not able to view reports directly through IE. I.e. http://<DNS_NAME>/Reports.
When I access Reports, it prompts me to enter username/password. Even after specifying valid username, it shows me the prompt again n again.

Is there some known issue with Reporting Service or with IIS setting not able to connect to a DNS name I did not face with any issue when
I specified DNS name in the connection string of Analysis Service project.

Did anyone encountered DNS related problem with SQL Server 2005 Reporting Service

We also verified that:
1: Ping with both machine name and DNS name returns same result.
2: nslookup with both machine name and DNS name resolves to same IP.

3: Tried putting the DNS name in the hosts file.

Eagerly awaiting some positive reply.

Note: I am working with SQL Server 2005 Standard Edition.

No replies yet

We are stuck up with this issue since quite some time.

still waiting for some positive inputs.

After doing some investigation, I have found that the issue is with Analysis server not able to connect using the DNS name (Note: my Reporting Service proj is connecting to Analysis services datasource). When I connect to Analysis server through SQL Server management studio (by def which uses Win authentication), and specify machine name (ABC) in Server then it connects but if I give DNS name (XYZ.PWR.COM) it gives me the following error:

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A connection cannot be made. Ensure that the server is running. (Microsoft.AnalysisServices.AdomdClient)

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Program Location:

at Microsoft.AnalysisServices.AdomdClient.XmlaClient.Connect(ConnectionInfo connectionInfo, Boolean beginSession)
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.XmlaClientProvider.Microsoft.AnalysisServices.AdomdClient.AdomdConnection.IXmlaClientProviderEx.ConnectXmla()
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.ConnectToXMLA(Boolean createSession, Boolean isHTTP)
at Microsoft.AnalysisServices.AdomdClient.AdomdConnection.Open()
at Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer.ObjectExplorer.ValidateConnection(UIConnectionInfo ci, IServerType server)
at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()

===================================

Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. (System)

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Program Location:

at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size)
at System.IO.BufferedStream.Read(Byte[] array, Int32 offset, Int32 count)
at Microsoft.AnalysisServices.AdomdClient.DimeRecord.ForceRead(Stream stream, Byte[] buffer, Int32 length)
at Microsoft.AnalysisServices.AdomdClient.DimeRecord.ReadHeader()
at Microsoft.AnalysisServices.AdomdClient.DimeRecord..ctor(Stream stream)
at Microsoft.AnalysisServices.AdomdClient.DimeReader.ReadRecord()
at Microsoft.AnalysisServices.AdomdClient.TcpStream.GetResponseDataType()

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If I connect to Reporting Service using DNS name then I get the following error:

************************************************************************************************************
===================================

Cannot connect to XYZ.PWR.COM.

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A connection to the report server failed. Most likely, you do not have permission to connect to the computer. You should either try to connect using a report server URL for the Server name, or if the Distributed COM Users group exists on the remote computer, verify that you are a member. (Microsoft.SqlServer.Management.UI.RSClient)

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Program Location:

at Microsoft.SqlServer.Management.UI.RSClient.RSConnectionInfo.ParseServerName(String serverName)
at Microsoft.SqlServer.Management.UI.RSClient.RSConnectionInfo.RSTypeImpl.CreateSqlOlapConnectionInfoBase(UIConnectionInfo ci)
at Microsoft.SqlServer.Management.UI.RSClient.RSConnectionInfo.RSTypeImpl.GetConnectionObject(UIConnectionInfo ci)
at Microsoft.SqlServer.Management.UI.ConnectionDlg.RSType.GetConnectionObject(UIConnectionInfo ci)
at Microsoft.SqlServer.Management.UI.VSIntegration.ObjectExplorer.ObjectExplorer.ValidateConnection(UIConnectionInfo ci, IServerType server)
at Microsoft.SqlServer.Management.UI.ConnectionDlg.Connector.ConnectionThreadUser()
************************************************************************************************************

When I ping with machine name (ABC) and DNS name (XYZ.PWR.COM), both resolves to the same IP.
C:\Documents and Settings\Administrator>ping ABC

Pinging ABC.corp.abctech.com [xx.x.xx.xx] with 32 bytes of d

C:\Documents and Settings\Administrator>ping XYZ.PWR.COM

Pinging XYZ.PWR.COM [xx.x.xx.xx] with 32 bytes of data:

Is this problem because of the kerberos authentication that Analysis server uses to authenticate

I am able to connect to the Database engine using DNS name (but using SQL Server authentication).
Also I was able to view the reportserver and reports page by changing the IIS authentication to NTLM.
But finally I am not able to view the reports.

Can anyone please help me in solving this issue.

Awatiitng some positive reply.