web.config文件有没有错，帮忙看下

<?xml version="1.0" encoding="UTF-8"?>

<configuration>

    <system.webServer>

        <defaultDocument>

            <files>

                <clear />

                <add value="index.html" />

                <add value="index.php" />

                <add value="Default.htm" />

                <add value="Default.asp" />

                <add value="index.htm" />

                <add value="iisstart.htm" />

                <add value="default.aspx" />

            </files>

        </defaultDocument>

        <httpErrors>

            <remove statusCode="404" subStatusCode="-1" />

            <error statusCode="404" prefixLanguageFilePath="" path="/404/index.html" responseMode="ExecuteURL" />

        </httpErrors>

        <httpRedirect enabled="false" destination="" exactDestination="false" childOnly="false" httpResponseStatus="Found" />

    </system.webServer>

</configuration>