SharePoint Addin For Reportingservice

Hi,

I have a security problem (?) with the integration of sharepoint and Reporting service:

Now I have 2 server,

One with windows server 2003 Enterpise edition with share point services 3.0, I have installed the addin in this server

One with Windows Server 2003 with Sql Server 2005 sp2.

I have configured the reporting server to use a new db in Sharepoint integrated mode, the windows service identity, web service identity, the execution account and the db credential use a windows credential and use a domain user. This user is an administrator in the sharepoint server and in the Sql server. The user have the grand in the sharepoint db and in the Reoprting service db (db_owner).

The connection pool for Sharepoint is running under a domain account identity and the connection pool of the reporting service is running under network service.

After that I have configured the manage integration setting (Windows Authentication) and the Grant database acces using the same domain user configured for Reporting service.

My user have the db_owner grant for the db of sharepoint and reporting service.

When i click on Set server default I receve this error:

The permissions granted to user '<domain><user>' are insufficient for performing this operation. ---> The permissions granted to user '<domain><user>' are insufficient for performing this operation.

My user is administraton in the sharepoint server and in the Sql server.

the log in the reporting service is:

w3wp!library!1!03/13/2007-14:42:04:: v VERBOSE: Transaction begin.
w3wp!security!1!03/13/2007-14:42:04:: i INFO: Exception while running with elevated privileges
w3wp!security!1!03/13/2007-14:42:04:: i INFO: Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
w3wp!library!1!03/13/2007-14:42:04:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.SharePointException: Report Server has encountered a SharePoint error., ;
Info: Microsoft.ReportingServices.Diagnostics.Utilities.SharePointException: Report Server has encountered a SharePoint error.
w3wp!library!1!03/13/2007-14:42:04:: v VERBOSE: Transaction rollback.
w3wp!runningrequests!1!03/13/2007-14:45:04:: v VERBOSE: SoapAction: "http://schemas.microsoft.com/sqlserver/2006/03/15/reporting/reportingservices/ListSecureMethods"
w3wp!runningrequests!1!03/13/2007-14:45:04:: v VERBOSE: SoapAction: "http://schemas.microsoft.com/sqlserver/2006/03/15/reporting/reportingservices/GetSystemProperties"
w3wp!library!1!03/13/2007-14:45:04:: Call to GetSystemPropertiesAction().
w3wp!library!1!03/13/2007-14:45:04:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.AccessDeniedException: The permissions granted to user '<domain><user>' are insufficient for performing this operation., ;
Info: Microsoft.ReportingServices.Diagnostics.Utilities.AccessDeniedException: The permissions granted to user '<domain><user>' are insufficient for performing this operation.
w3wp!security!1!03/13/2007-14:45:04:: i INFO: Exception while running with elevated privileges
w3wp!security!1!03/13/2007-14:45:04:: i INFO: The permissions granted to user '<domain><user>' are insufficient for performing this operation.
w3wp!library!1!03/13/2007-14:45:04:: e ERROR: Throwing Microsoft.ReportingServices.Diagnostics.Utilities.AccessDeniedException: The permissions granted to user '<domain><user>' are insufficient for performing this operation., ;
Info: Microsoft.ReportingServices.Diagnostics.Utilities.AccessDeniedException: The permissions granted to user '<domain><user>' are insufficient for performing this operation.

Please, could someone help me?