Te lo comento por estos mensajes:
Server Warning: Support for the
VIA protocol is deprecated and will be removed in a future version of Microsoft SQL Server. If possible, use a different network protocol and disable VIA.
Server Server
named pipe provider is ready to accept connection on [ \\.\pipe\MSSQL$SERVER_DES\sql\query]
En cuanto a los errores de login, consulta esta liga:
http://sql-articles.com/articles/tro...d-error-18456/