failure in testing

I using PHPUnit and Selenium Server to testing Yii Application, i m using xp operating system. and i install PHPUnit_Selenium (1.0.1) and other software.actually i follow this bellow instruction to install http://www.yiiframework.com/forum/index.php?/topic/14995-wamp-netbeans-phpunit-selenium-yii/

and i also download the selenium-server-standalone-2.20.0.jar file and through command prompted i started server using java -jar selenium-server-standalone-2.0b3.jar command…

and after that i opened new command prompt and i tried to test my simple hello world yii application. and i invoked this command phpunit functional/SiteTest.php and ya i also set the Test_Base_URL in webtestcase …

but after invoking above command for test… some process going on and 2 or 3 times firefox opened and closed automatically and at the end i got this error "@php_bin@" is not recognized as an internal or external command,operable program or batch file

plz help me …! thanks in advance…!