composer not install in windows 7

I already uncommented in php.ini:

[PHP];;;;;;;;;;;;;;;;;;;
 ; About php.ini ;;;;;;;;;;;;;;;;;;;;;extension=php_oci8_11g.dll
extension=php_openssl.dll;extension=php_pdo_firebird.dll

Variables of the system set ok.

PHP version 5.4.16:

C:\wamp\bin\php\php5.4.16\php.exe

Add to System path variable:

C:\ProgramData\ComposerSetup\bin

But, recive this error:

Some settings on your machine make Composer unable to work properly.Make sure that you fix the issues listed below and run this script again:The openssl extension is missing, which means that secure HTTPS transfers are
impossible. If possible you should enable it or recompile php with --with-openssl

I’m using:

• windows 7
• Wamp
• php 5.1.16
• apache 2.4.4

How solve this problem, please help me.