Query Related to Work Order

Hello Experts,

I am facing problem regarding costs in work order.

After creating a work order of type PM02 we are not able to view the Plan Cost in "Costs" tab.

This is happening from year 2012 as in previous orders we were able to view the costs in year 2011.

Not able to understand the reason behind it as i am new to this module.

Thanks

Himanshu