any one know on quartz scheduling

Hi,

I am getting a problem in rescheduling the job using quartz.

thhis is my sample code.

Date newtime=new Date(date.getTime()+(10000L*6L*cim));

JobDetail job = new JobDetail("job1", "group1",SimpleJob.class);

SimpleTrigger trigger = new SimpleTrigger ("trigger","group", newtime);

sched.rescheduleJob("job1","group1",trigger);

i am getting the exception as :

org.quartz.SchedulerException: Trigger's related Job's name cannot be null

at org.quartz.Trigger.validate(Trigger.java:906)

at org.quartz.SimpleTrigger.validate(SimpleTrigger.java:853)

at org.quartz.core.QuartzScheduler.rescheduleJob(QuartzScheduler.java:857)

at org.quartz.impl.StdScheduler.rescheduleJob(StdScheduler.java:314)

at SchedulerMaint.resetScheduler(SchedulerMaint.java:80)

at Test.main(Test.java:31)

[865 byte] By [bhumireddya] at [2007-11-26 17:04:06]