title: C# ODBC getSchema("Tables") sends results but getSchema("Columns") returns nothing
body: <p>I have an ODBC connection using a DSN and I am trying to get the tables and columns from it (for manipulation later) but it is failing at an early stage. The database is a FairCom C-tree (v 6.11) if it matters:</p>
  
  <pre><code>OdbcConnection odbcConn = new OdbcConnection("DSN=Ctree;");
  odbcConn.Open();
  
  DataTable tblTables = odbcConn.GetSchema("Tables"); 
  foreach (DataRow row in tblTables.Rows) //displays them one at a time (works)
       MessageBox.Show(row["TABLE_NAME"].ToString());
  
  DataTable tblColumns = odbcConn.GetSchema("Columns"); // (why is this empty?)
  foreach (DataRow row in tblColumns.Rows) //lists nothing
       MessageBox.Show(row["COLUMN_NAME"].ToString() + " : " + row["TABLE_NAME"].ToString());
  </code></pre>
  
  <p>The issue is that getSchema("Tables") works just fine so I know that the connection works, the drivers are in good shape and that data exists. So why is getSchema("Columns") failing? I also know there is data (hundreds of columns and thousands of rows) inside the db. I am at a loss.</p>
  
  <p>Thoughts?</p>