1st. : Open "C:\WINDOWS\Syswow64\odbcad32.exe" ; select "SystemDNS" and remove all dns's.
2nd. : Add the new dns's that the ODBC connection is needed as follow :
"Add" -> as new data source you select "SQL Server" -> click "Finish"
"Name - the name of DNS (ex. MuOnline, MuOnlineJoinDB,....)" ->...