Count Query with not_analyzed mapping

create.sh

curl -XDELETE 'http://localhost:9200/myindex'
curl -XPUT 'http://localhost:9200/myindex'

curl -XPUT 'http://localhost:9200/myindex/myindext/_mapping' -d '{
    "myindext": {
        "properties": {
            "user": {
                "type": "string"
            },
            "message": {
                "type": "string"
            },
            "post_date": {
                "type": "date"
            },
            "UserGender": {
                "type": "string",
                "index": "not_analyzed"
            }
        }
    }
}'

curl -XPUT 'http://localhost:9200/myindex/myindext/1' -d '{
    "_id" : 1,
    "user" : "sachin",
    "post_date" : "2012-1-02T00:00:00",
    "message" : "lovely world 0",
	"UserGender":"M"
}'
curl -XPUT 'http://localhost:9200/myindex/myindext/2' -d '{
    "_id" : 2,
    "user" : "sachin",
    "post_date" : "2012-1-03T00:00:00",
    "message" : "lovely world 1",
	"UserGender":"M"
}'
curl -XPUT 'http://localhost:9200/myindex/myindext/3' -d '{
    "_id" : 3,
    "user" : "ni",
    "post_date" : "2012-1-10T00:00:00",
    "message" : "lovely world 2",
	"UserGender":"F"
}'
curl -XPUT 'http://localhost:9200/myindex/myindext/4' -d '{
    "_id" : 4,
    "user" : "sumit",
    "post_date" : "2012-1-04T00:00:00",
    "message" : "lovely world 3",
	"UserGender":"M"
}'

search.sh

curl -XGET 'http://localhost:9200/myindex/myindext/_count' -d '{
        "filtered": {
            "query": {
                "range": {
                    "post_date": {
                        "from": "2012-1-02T00:00:00",
                        "to": "2012-1-03T00:00:00"
                    }
                }
            },
            "filter": {
                "term": {
                    "UserGender": "M"
                }
            }
        }
}'