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Nprinting Npgsql error

I have setup an nprinting 17.1 server on my laptop but I´m getting the following error in the logs. Any Clue?

I can ping localhost with no problem.

Npgsql.NpgsqlException:

Failed to establish a connection to 'localhost'.

   at Npgsql.NpgsqlClosedState.Open(NpgsqlConnector context, Int32 timeout)

   at Npgsql.NpgsqlConnector.Open()

   at Npgsql.NpgsqlConnectorPool.GetPooledConnector(NpgsqlConnection Connection)

   at Npgsql.NpgsqlConnectorPool.RequestPooledConnectorInternal(NpgsqlConnection Connection)

   at Npgsql.NpgsqlConnectorPool.RequestConnector(NpgsqlConnection Connection)

   at Npgsql.NpgsqlConnection.Open()

   at Qlik.NPrinting.Repo.Utils.NHibernateUtils.ExecuteCmd(String sql, String connectionString, Func`2 cmd) in c:\Jws\workspace\REL-NP-MS15-BRONZE-01-build\server\NPrinting\src\Repo\Utils\NHibernateUtils.cs:line 286

   at Qlik.NPrinting.Repo.Utils.NHibernateUtils.DatabaseExists(String host, Int32 port, String username, String password, String database) in c:\Jws\workspace\REL-NP-MS15-BRONZE-01-build\server\NPrinting\src\Repo\Utils\NHibernateUtils.cs:line 131

   at Qlik.NPrinting.Repo.Utils.NHibernateUtils.CreateNHibernateSessionFactory(String host, Int32 port, String username, String password, String database, DbAction dbAction, Configuration configuration, Boolean& isNewDb) in c:\Jws\workspace\REL-NP-MS15-BRONZE-01-build\server\NPrinting\src\Repo\Utils\NHibernateUtils.cs:line 75

2016-07-20 15:02:12,054 [6] ERROR Qlik.NPrinting.Repo.Utils.NHibernateUtils - The database nprinting could not be queried.

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