[GIC]

In my opinion, working with DataAdapters and DataSets is more flexible and more accurate.

Anyway, I don't really know your way of doing, but with a proper connectionString it works fine for my needs. Here is an instance:

string conStr = "Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserName;Password=UserPassword";
SqlConnection con;
SqlDataAdapter da;
ReportDocument rd;
DataSet ds;

try
{
       ds = new DataSet();
       con = new SqlConnection(conStr);
       rd = new ReportDocument();

       string sql = "SELECT * FROM TABLE";
       da = new SqlDataAdapter(sql, con);
       da.Fill(ds, "DataTableName");
       rd.SetDataSource(ds);
}
catch(Exception ex)
{
       throw new Exception("Internal error: " +ex.Message);
}
finally
{
       rd.Close();
       if(ds != null) ds.Dispose();
       if(da != null) da.Dispose();
}

This way, it works fine for me. You may also prefer to use the TableLogOnInfo object.

Hope this helps.