Database connection issue

Hey all!

I'm rather new to connecting to external sources so bear with me. The error I'm getting is that "No data exists for the row/column."

the code in question:

String ConnectionString;
ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source = C:\\Users;Extended Properties =dBase IV;";
System.Data.OleDb.OleDbConnection dBaseConnection;
dBaseConnection = new System.Data.OleDb.OleDbConnection(ConnectionString);
dBaseConnection.Open();
System.Data.OleDb.OleDbCommand dBaseCommand;
dBaseCommand = new System.Data.OleDb.OleDbCommand("SELECT FPHONE FROM ADDRESS", dBaseConnection);
System.Data.OleDb.OleDbDataReader dBaseDataReader;
dBaseDataReader = dBaseCommand.ExecuteReader(CommandBehavior.SequentialAccess);

txtFaxNum.Text = dBaseDataReader.GetValue(0).ToString();


The full data source is in that format (meaning seperated with \\ ) and the coloumn name is correct and that is the name of the table. Can anyone tell me what I'm doing wrong?