Querying With Composite Keys Doesn't Work about fluentcassandra HOT 3 CLOSED

Here is the Column Family I use:
===================================================
ColumnFamily: Data
  Key Validation Class: org.apache.cassandra.db.marshal.CompositeType(org.apache.cassandra.db.marshal.AsciiType,org.apache.cassandra.db.marshal.AsciiType,org.apache.cassandra.db.marshal.TimeUUIDType)
  Default column value validator: org.apache.cassandra.db.marshal.BytesType
  Columns sorted by: org.apache.cassandra.db.marshal.AsciiType
  GC grace seconds: 864000
  Compaction min/max thresholds: 4/32
  Read repair chance: 0.1
  DC Local Read repair chance: 0.0
  Replicate on write: true
  Caching: KEYS_ONLY
  Bloom Filter FP chance: default
  Built indexes: []
  Compaction Strategy: org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy
  Compression Options:
    sstable_compression: org.apache.cassandra.io.compress.SnappyCompressor
===================================================

    public void InsertData(string keyspace, Data data, DateTimeOffset stamp)
    {
        using (var db = new CassandraContext(keyspace: keyspace, server: _server))
        {
            var productFamily = db.GetColumnFamily("Data");
            var key = new CompositeType<AsciiType, AsciiType, TimeUUIDType>(data.Key1, data.Key2, stamp);


            var post = productFamily.CreateRecord(key);
            db.Attach(post);
            foreach (var fieldValue in data.Values)
            {
                if (!post.TrySetColumn(fieldValue.Key, fieldValue.Value))
                    throw new InvalidDataException(string.Format("Can't add {0}:{1}", fieldValue.Key,
                                                                 fieldValue.Value));
            }
            db.SaveChanges();
        }
    }

    public dynamic GetData(string keyspace, string source, string product, DateTimeOffset stamp, params CassandraObject[] columns)
    {
        var key = new CompositeType<AsciiType, AsciiType, TimeUUIDType>(source, product, stamp);

        using (var db = new CassandraContext(keyspace: keyspace, server: _server))
        {
            var productFamily = db.GetColumnFamily("Data");
            var keys = new [] {key};
            return productFamily.Get(keys).FetchColumns(columns).FirstOrDefault().AsDynamic();
        }
    }