ImageMagick支持wamp服务器2.5中没有值的格式

I try to install imagick on WAMP server but not install.
I follow complete process according to
http://www.jarrodtoh.com/getting-imagick-work-wamp-2-5-php-5-5-12/ Where to find php_imagick.dll for php 5.5.12 for Windows wampserver 2.5?
I also set MAGICK_HOME as environment variable and path C:\wamp\bin\php\php5.5.12\ext\imagick\
Also set extension=C:\wamp\bin\php\php5.5.12\ext\imagick\php_imagick.dll in php.ini file
But in phpinfo() ImageMagick supported formats display no value.

Wamp Server:- 2.5
Window 7 32-Bit Os

I installed php_imagick-3.1.2-5.5-ts-vc11-x86.zip from http://windows.php.net/downloads/pecl/releases/imagick/3.1.2/
also installed ImageMagick-6.8.9-1-vc11-x86.zip from http://windows.php.net/downloads/pecl/deps/ in C:\wamp\bin\php\php5.5.12\ext\imagick folder.

Copy all dll files from path-to-ImageMagick\modules\coders to path-to-ImageMagick. Then restart Apache and run again phpinfo(). Supported formats should appear now.