ODBC cannot connect to SQL Server

Hello,

I've the following configuration:

- Server: 2008 R2, at machine A, W7 x64

- Client: tried to connect via ODBC (SQL Server) & SQL Management Studio, at machine B, W7 x64

With SQl Management Studio I can browse the <A> SQL Server, but if I try to configure ODBC connection at machine A it doesn't show SQL Server <A>, if I type the server name and try to continue it raises the following error:

SQLState: 01000

SQL Server error: 10061

SQLState: 08001

SQL Server error: 17

Obviously the SQL Server Service is runnig, firewalls are disabled, remote connections enabled, etc.

Any idea?

A lot of thanks.