error coming after adding multipart resolver in contextConfigLocation file

See more:

Java

Spring

Following is my contextConfigLocation file where i have added bean tag to add multipart resolver to my project to upload file, here after adding this i am getting error "HTTP status 404 -type Status report message description The requested resource is not available. "
Above error is coming while i am trying to open welcome page (which is main page)
Please help me out.Thanks

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

    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xmlns:context="http://www.springframework.org/schema/context"
        xsi:schemaLocation="
            http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
            http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
            http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <context:annotation-config/>     
      <context:component-scan base-package="net.codejava.spring" /> 
<bean id="multipartResolver"
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">   
        <property name="maxUploadSize" value="20971520" /> <!-- 20MB -->

        <property name="maxInMemorySize" value="1048576" /> <!-- 1MB -->

    </bean>

</beans>