求教！！WIN7下 APPSERV调试网站时，无法打开WWW目录下的网站

出现的错误：
Warning: require(Zend/Application.php) [function.require]: failed to open stream: No such file or directory in D:\Program Files\AppServ\www\yxy\public_html\index.php on line 18

Fatal error: require() [function.require]: Failed opening required 'Zend/Application.php' (include_path='.;D:\Program Files\AppServ\www\yxy\library;.;C:\php5\pear') in D:\Program Files\AppServ\www\yxy\public_html\index.php on line 18

[ 本帖最后由 yuyu1805 于 2012-5-6 11:26 编辑 ]