Quartz CronTrigger firing twice

[v1pka]

I have several job in my applicationContext.xml - they should be fired once a hour, but the are fired twice by Quartz.
I read this forum, but I can't understand how to solve this problem.
This is a similar thread, but there are only theoretical solution and I need a practical solution of my problem..
http://forum.springsource.org/showth...622#post266622
http://forum.springsource.org/showth...b-firing-twice
http://forum.springsource.org/showth...han-configured
Here my applicationContext.xml:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

	<bean id="ADSyncQuartzSpringJob" class="ru.croc.dms.mgik.dmsor.jobs.ActiveDirectorySync" />

	<bean id="jobDetail"
		class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
		<property name="targetObject" ref="ADSyncQuartzSpringJob" />
		<property name="targetMethod" value="execute" />
	</bean>

	<bean id="trigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
		<property name="jobDetail" ref="jobDetail" />
		<property name="cronExpression" value="0 0 0 1/1 * ? *" />
	</bean>

	<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
		<property name="triggers">
			<list>
				<ref bean="trigger" />
				<ref bean="taskTrigger" />
				<ref bean="clearTaskTrigger" />
				<ref bean="attachedFilesTrigger" />
			</list>
		</property>
	</bean>

	<bean id="taskNotificationJob" class="ru.croc.dms.mgik.dmsor.jobs.TaskNotification" />

	<bean id="taskNotifJobDetail"
		class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
		<property name="targetObject" ref="taskNotificationJob" />
		<property name="targetMethod" value="notifyUsers" />
	</bean>

	<bean id="taskTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
		<property name="jobDetail" ref="taskNotifJobDetail" />
			<property name="cronExpression" value="0 0,30 * * * ?" />
	</bean>
	
	<bean id="clearTaskNotificationJob" class="ru.croc.dms.mgik.dmsor.jobs.ClearTaskNotification" />
	
	<bean id="clearNotificationJobDetail"
		class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
		<property name="targetObject" ref="clearTaskNotificationJob" />
		<property name="targetMethod" value="clearTasks" />
	</bean>

	<bean id="clearTaskTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
		<property name="jobDetail" ref="clearNotificationJobDetail" />
		<property name="cronExpression" value="0 55 23 * * ?" />
	</bean>


	<bean id="attachedFilesSyncJob" class="ru.croc.dms.mgik.dmsor.jobs.AttachedFilesSync" />
	
	<bean id="attachedFilesSyncDetail"
		class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
		<property name="targetObject" ref="attachedFilesSyncJob" />
		<property name="targetMethod" value="syncAttachedFiles" />
	</bean>

	<bean id="attachedFilesTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean">
		<property name="jobDetail" ref="attachedFilesSyncDetail" />
		<property name="cronExpression" value="0 59 23 * * ?" />
	</bean>

</beans>

and web.xml

<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="2.5" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    
    <display-name>dmsor</display-name>
    
    <description>dmsor application</description>

    
    <!-- Enable escaping of form submission contents -->
    <context-param>
        <param-name>defaultHtmlEscape</param-name>
        <param-value>true</param-value>
    </context-param>
    
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath*:META-INF/spring/applicationContext*.xml</param-value>
    </context-param>
    
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    
    
    
    <filter>
        <filter-name>HttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    
    
    
    <filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>
    <filter>
        <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
        <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <filter-mapping>
        <filter-name>HttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    
    
    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <filter-mapping>
        <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- Creates the Spring Container shared by all Servlets and Filters -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <!-- Handles Spring requests -->
    <servlet>
        <servlet-name>dmsor</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>WEB-INF/spring/webmvc-config.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet-mapping>
        <servlet-name>dmsor</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <session-config>
        <session-timeout>10</session-timeout>
    </session-config>
    
    <error-page>
        <exception-type>java.lang.Exception</exception-type>
        <location>/uncaughtException</location>
    </error-page>
    
    <error-page>
        <error-code>404</error-code>
        <location>/resourceNotFound</location>
    </error-page>
</web-app>

Thanks!