Ciao a tutti

ho installato Sql Server Express 2008 R2

ho fatto tutta l'installazione del motore e termina tutto correttamente.

quando voglio aprire un preogetto in asp.net che utilizza un daatabse in sql server mi restituisce questo errore:

Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
penso si a un problema di autorizzazioni ho cercato in giro ma non riesco a trovare una soluzione...