Problem with libcassandra

[Shubham Mittal]

I am trying to run below code, but it gives this error. It compiles without
any errors.  Kindly help me.
(source of the code :
http://posulliv.github.io/2011/02/27/libcassandra-sec-indexes/)

terminate called after throwing an instance of
'org::apache::cassandra::InvalidRequestException'
  what():  Default TException.
Aborted


#include <string.h>
#include <sstream>
#include <iostream>
#include <stdlib.h>
#include <set>
#include <string>
#include <stdio.h>
#include <vector>

#include <libcassandra/cassandra_factory.h>
#include <libcassandra/cassandra.h>
#include <libcassandra/column_family_definition.h>
#include <libcassandra/keyspace.h>
#include <libcassandra/keyspace_definition.h>

using namespace std;
using namespace libcassandra;

static string host("127.0.0.1");
static int port= 9160;

int main()
{

    CassandraFactory cf(host, port);
    tr1::shared_ptr<Cassandra> c(cf.create());

    KeyspaceDefinition ks_def;
    ks_def.setName("demo");
    c->createKeyspace(ks_def);

    ColumnFamilyDefinition cf_def;
    cf_def.setName("users");
    cf_def.setKeyspaceName(ks_def.getName());

    ColumnDefinition name_col;
    name_col.setName("full_name");
    name_col.setValidationClass("UTF8Type");

    ColumnDefinition sec_col;
    sec_col.setName("birth_date");
    sec_col.setValidationClass("LongType");
    sec_col.setIndexType(org::apache::cassandra::IndexType::KEYS);

    ColumnDefinition third_col;
    third_col.setName("state");
    third_col.setValidationClass("UTF8Type");
    third_col.setIndexType(org::apache::cassandra::IndexType::KEYS);

    cf_def.addColumnMetadata(name_col);
    cf_def.addColumnMetadata(sec_col);
    cf_def.addColumnMetadata(third_col);

    c->setKeyspace(ks_def.getName());
    c->createColumnFamily(cf_def);

    return 0;
}