Subquery results in SP getting lost when called in .Net App

Hi,

I've written a Stored Procedure below:-

CREATE PROCEDURE [dbo].[getQuestionsByTopic]
      -- Add the parameters for the stored procedure here
      @topicId int,
      @quoteId int
AS
BEGIN
      -- SET NOCOUNT ON added to prevent extra result sets from
      -- interfering with SELECT statements.
      SET NOCOUNT ON;

    -- Insert statements for procedure here
      SELECT q.*, a.questionAnswer, a.answerId FROM question q
      LEFT JOIN (SELECT questionId, questionAnswer, quoteId, Id AS answerId FROM questionAnswer WHERE quoteId = @quoteId) AS a ON q.questionId = a.questionId
      WHERE q.topicId = @topicId;
END

When ran from SQL Management Studio, it returns what I want - all questions and any answers based on Quote ID. However, when I call it in my .Net app, the fields specifically in the subquery never appear. Any ideas? Here's my code which grabs a dataset anyway:-

public DataTable getQuestionsByTopic (int topicId, int quoteId) {
                  DataTable dt = new DataTable();
                  SqlConnection conn = new SqlConnection();
                  
                  Open(conn);
                        using (SqlCommand command = new SqlCommand()) {
                              command.Connection = conn;
                              command.CommandType = CommandType.StoredProcedure;
                              command.CommandText = "getQuestionsByTopic";
                    command.Parameters.AddWithValue("@quoteId", topicId);
                    command.Parameters.AddWithValue("@topicId", topicId);

                              try { using(SqlDataAdapter adapt = new SqlDataAdapter(command)) adapt.Fill(dt); }
                              catch (Exception ex) { WritetoEventLog(ex.Message); }
                              finally { conn.Close(); }
                        }
                  
                  return dt;
            }