安裝時提示錯誤，請高手幫忙解決一下

安裝時提示錯誤，請高手幫忙解決一下。謝謝
php_network_getaddresses: getaddrinfo failed: ��֪��������������
錯誤位置

FILE: E:\wamp\www\ThinkPHP\Library\Think\Db\Driver\Mysql.class.php  LINE: 55

TRACE

#0 E:\wamp\www\ThinkPHP\Library\Think\Db\Driver\Mysql.class.php(55): E('php_network_get...')
#1 E:\wamp\www\ThinkPHP\Library\Think\Db.class.php(164): Think\Db\Driver\Mysql->connect()
#2 E:\wamp\www\ThinkPHP\Library\Think\Db\Driver\Mysql.class.php(118): Think\Db->initConnect(true)
#3 E:\wamp\www\Application\Install\Controller\InstallController.class.php(81): Think\Db\Driver\Mysql->execute('CREATE DATABASE...')
#4 [internal function]: Install\Controller\InstallController->step2(Array, Array)
#5 E:\wamp\www\ThinkPHP\Library\Think\App.class.php(141): ReflectionMethod->invokeArgs(Object(Install\Controller\InstallController), Array)
#6 E:\wamp\www\ThinkPHP\Library\Think\App.class.php(181): Think\App::exec()
#7 E:\wamp\www\ThinkPHP\Library\Think\Think.class.php(117): Think\App::run()
#8 E:\wamp\www\ThinkPHP\ThinkPHP.php(94): Think\Think::start()
#9 E:\wamp\www\install.php(36): require('E:\wamp\www\Thi...')
#10 {main}