Generation of Payroll Periods

Hi,

I'm training in payroll and just start based on the document which i hold and this error notification appear.

I have create the period modifiers but I don't understand where is the mistake below are the image from my screen

What is that means - No entry in table T549A for key 15 00

what should i have to do to proceed further

Next thing in line is Check payroll periods

Change View "Period Parameters" : Overview

The last image which i posted shows 01.03.2014 - I thing probably that's where mistake lies. (I don't know)

Thanks