Error when update number_of_replicas

Hi,
I am following documentation explained via
http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-update-settings.html

When I run this command, I got acknowledged= True, followed by error
messages below.

C:>curl -XPUT "localhost:9200/qsearch_perf/_settings" -d ' { "index" : {
"number_of_replicas" : 4 } }'

{"acknowledged":true}curl: (3) [globbing] unmatched brace in column 1
curl: (6) Could not resolve host: index
curl: (7) Failed to connect to port 80: Connection refused
curl: (3) [globbing] unmatched brace in column 1
curl: (6) Could not resolve host: number_of_replicas
curl: (7) Failed to connect to port 80: Connection refused
curl: (6) Could not resolve host: 4
curl: (3) [globbing] unmatched close brace/bracket in column 1
curl: (3) [globbing] unmatched close brace/bracket in column 1

Can you pls let me know what's wrong with my command?
I have closed qsearch_perf index before I run this command.

Besides, I can't run this command in separate lines in CURL, It prompt me
error. I have to run this command in 1 line in curl.
Is this expected behavior in CURL?

Thanks.

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