1. Tu chiar vrei pe named pipes?
2. Daca nu neaparat da asta e oroarea vezi de firewall adica sa lase porturile SQL http://support.microsoft.com/default.aspx/kb/287932.

Late edit: super resursa asta http://blogs.msdn.com/sql_protocols/archive/2007/03/31/named-pipes-provider-error-40-could-not-open-a-connection-to-sql-server.aspx, nu stiam de ea a ajuns la favorites.