web.config文件出错了！应该怎么配置啊？

[ramiro]

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<system.web>
<authentication mode="None"/>
<appSettings>
<add key="ConnectionSqlServer" value="Data Source=Tony;Initial Catalog=northwind;User Id=sa;Password=aaa;"></add>
</appSettings >
</system.web>
</configuration>
出错信息：

行 3: <system.web>
行 4: <authentication mode="None"/>
行 5: <appSettings>
行 6: <add key="ConnectionSqlServer" value="Data Source=Tony;Initial Catalog=northwind;User Id=sa;Password=aaa;"></add>
行 7: </appSettings >

[webwait]

参考这个
<?xml version="1.0"?>

<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
<appSettings/>
<connectionStrings>
<add name="Northwind" connectionString="Server=localhost;Integrated Security=True;Database=Northwind" providerName="System.Data.SqlClient"/>
</connectionStrings>
<system.web>

<anonymousIdentification enabled="true" />
<profile> //定义配置（profile）
<properties>
<add name="Theme" allowAnonymous="true" />
<add name="LastVisit" type="System.DateTime" allowAnonymous="true" />
</properties>
</profile>
<!--
<webParts> //定义配置（webParts）
<personalization defaultProvider="AspNetSqlPersonalizationProvider"/>
</webParts>
-->
<!--
Set compilation debug="true" to insert debugging symbols into the compiled page.
Because this affects performance, set this value to true only during development.
-->
<compilation debug="true">
<expressionBuilders>
<add expressionPrefix="Version" type="VersionExpressionBuilder"/>
</expressionBuilders>
</compilation>
<!--
The <authentication> section enables configuration of the security authentication
mode used by ASP.NET to identify an incoming user.
-->
<authentication mode="Windows"/>
<!--
The <customErrors> section enables configuration of what to do if/when an unhandled
error occurs during the execution of a request. Specifically, it enables developers
to configure html error pages to be displayed in place of a error stack trace.
-->
<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
<!--
<error statusCode="403" redirect="NoAccess.htm"/>
<error statusCode="404" redirect="FileNotFound.htm"/>
-->
</customErrors>
</system.web>
</configuration>

[ramiro]

源文件: F:\MyWebSite\mywebsite\web.config 行: 5

[xiaozuo2005]

<appSetting>

[webwait]

<appSettings>写在<configuration>内,<system.web>外

[songming1984]

<appSettings>应该写在</configuration>内