Using VC++ 6 with ADO.

I'm new to Oracle, so this may be a setup issue. Currently I have to qualify a table name with it's schema name in order for even the simpliest of queries to work ( e.g. SELECT * FROM SHEMANAME.MyTable ). How can I avoid having to qualify a table with it's schema???

Logging in, I've tried both MS and Oracle OLE DB provider's; here are the connection strings:
1.) _bstr_t connectString = "Provider=OraOLEDB.Oracle;Data Source=Cardlist;User Id=MyUserName;Password=MyPassword;";
2.) _bstr_t connectString = "Provider=msdaora;Data Source=Cardlist;User Id=MyUserName;Password=MyPassword;";
3.) _bstr_t connectString = "Provider=OraOLEDB.Oracle;Data Source=Cardlist;OSAuthent=1;";

Thanks