How can I solve this problem: try from server administrator
One option is that the connection settings are incorrect:
SQL Server Configuration Manager
> > SQL Server Network Configuration
. TCP/IP
and enable it with right click (select Enable
). Another option is that the Shared Memory Protocol is not enabled, which is required by MS SQL:
SQL Server Network Configuration
. Shared Memory
→ select Enable
. Another option is that there are messes in the configuration of the account that tries to login:
Security
of the tree logins
directory
Propiedades
.