Struts2+Spring 3 validations issue - spring

Question

I am trying to use struts2 validations. I have a setup with Struts2.2.3 and Spring 3.0.5. I have a -validation.xml in place. Fields are getting validated and error message is getting displayed on the server console, but its not getting displayed on the UI. Also action is not getting forwarded to the results specified for the "input" tag.
My action class does not extend from ActionSupport instead it implements Preparable. Is this could be the problem?
So I also tried with my Action class define as
public class CandidateAction extends ActionSupport implements Preparable
on hitting the page i am getting following error
Invalid action class configuration that references an unknown class named [candidateAction]
even though i have a bean defined with name "candidateAction" in the application context.xml
ApplicationContext.xml
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">
<bean
class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
<bean id="dao" class="org.kovid.dao.impl.DaoImpl" />
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
<property name="database" value="MYSQL" />
<property name="showSql" value="true" />
</bean>
</property>
</bean>
<bean id="dataSource"
class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost/xyz" />
<property name="username" value="abc" />
<property name="password" value="abc" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="baseAction" scope="prototype" class="org.kovid.action.BaseAction">
</bean>
<bean id="candidateAction" scope="prototype"
class="org.kovid.matrimony.action.CandidateAction">
<constructor-arg ref="dao" />
</bean>
<bean id="simpleSearchAction" scope="prototype"
class="org.kovid.matrimony.action.SimpleSearchAction">
<constructor-arg ref="dao" />
</bean>
<bean id="advanceSearchAction" scope="prototype"
class="org.kovid.matrimony.action.AdvanceSearchAction">
<constructor-arg ref="dao" />
</bean>
<bean id="imageAction" scope="prototype"
class="org.kovid.matrimony.action.ImageAction">
<constructor-arg ref="dao" />
</bean>
</beans>