Can not connect sqlstudio

Hi everyone, When I try to connect sqlstudio by this step ABAP Trial Version for Newbies: Part 16 ' MaxDB: Database Manager and SQL Studio ' but I can not to connect sqlstudio because this problem.

ODBC-Error: [SAP AG][SQLOD32 DLL][MAXDB] Unable to connect to data source;-709 CONNECT: (unknown host name) return-code:SQL_ERROR(-709)

Could you help me the problem and method to fix it,please ?

Thank you