Application Role And SSRS

Hi dear reader

I made an application that uses a Sql Server 2005 Express DataBase.

In the database I made a application role.

When the user logs into my application I run this procedure:

If Not sqlConnectionCR Is Nothing Then

If Not sqlConnectionCR.State = ConnectionState.Open Then

sqlConnectionCR.Open()

SqlConnection.ClearAllPools()

ConsultasSqlCommand = New SqlCommand

ConsultasSqlCommand.CommandType = CommandType.Text

ConsultasSqlCommand.CommandText = "sp_setapprole 'appRole', 'drowssap"

ConsultasSqlCommand.Connection = sqlConnectionCR

ConsultasSqlCommand.ExecuteNonQuery()

End If

Else....

I understand that this procedure connects to my sqlserver database as my application role

Ok, so far no problems in reading and manipulating data.

The problem comes with the reports in my application. For example: I have a reportviewer with a serverreport but when I try to show the report gives an error about permissions and grant access....

I think that is because the Server Report uses the user account (domain/user) to read the database. No user (besides admin) has access permissions in the database (only admin and application role).

So, my cuestion is: How can I tell Report Server to use the application role to display reports?

Thank you for your time and help.

Giber