应用程序中的server错误，没有名称为“ServiceBehavior”的服务行为

<?
xml version="1.0"?
>
<configuration>
	<connectionStrings>
		<add name="NorthwindConnectionString" connectionString="Data Source=.;Initial Catalog=Northwind;User ID=sa;Password=123" providerName="System.Data.SqlClient"/>
	</connectionStrings>
	<system.web>
		<compilation debug="true" targetFramework="4.0">
			<assemblies>
				<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/></assemblies></compilation>
	</system.web>
	<system.serviceModel>
		<services>
			<service name="ProductsService" behaviorConfiguration="ServiceBehavior">
				<!--Service Endpoints-->
				<endpoint address="" binding="wsHttpBinding" contract="IProductsService"/>
				<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/>
			</service>
		</services>
		<behaviors>
			<serviceBehaviors>
				<behavior>
					<!-- 为避免泄漏元数据信息，请在部署前将下面值设置为 false 并删除上面的元数据终结点 -->
					<serviceMetadata httpGetEnabled="true"/>
					<!-- 要接收故障异常具体信息以进行调试。请将下面值设置为 true。在部署前设置为 false 以避免泄漏异常信息-->
					<serviceDebug includeExceptionDetailInFaults="false"/>
				</behavior>
			</serviceBehaviors>
		</behaviors>
		<serviceHostingEnvironment multipleSiteBindingsEnabled="true"/>
	</system.serviceModel>
	<system.webServer>
		<modules runAllManagedModulesForAllRequests="true"/>
	</system.webServer>
</configuration>