问使用Zend_Log加密代码时找不到ZendGuard类

EN

if(zend_loader_file_encoded()) {

    if(!zend_loader_enabled() || !zend_get_id()) {

        exit('<strong>Error:</strong> The Zend Optimizer loader is not enabled! <br /><br />To enable it, please modify the following in your php.ini:  zend_optimizer.enable_loader = on.');
                                                }

            else if(!zend_loader_file_licensed()){
                $licensePath = Mage::getModuleDir('etc', 'MyModule_TestModule'). DS . 'license' . DS . 'license.zl';
                    if(!file_exists($licensePath)) {
                        exit("<strong>Error:</strong> No license file was found. Your license file should be located in: $licensePath. <br /><br />If you do not have a license, you need to obtain one from the Dev Team by contacting: <a href=\"mailto:devteam@site.com\">devteam@site.com</a>.");
                                               } 

if(!zend_loader_install_license($licensePath)) {
exit('<strong>Error:</strong> An error occurred while loading your license file. Please contact support at <a href="mailto:devteam@site.com">devteam@site.com</a>.');
                       }
                    }
                }