Time Management

Hi Time Guru's

I have a requirement from my client to create a new workschedule which is valid from 01.1.2013, so i have created workschedule and generated it from 01.01.2013 to 31.12.2013.

But when i apply leave on 01.01.2013 through 2001IT, it throws me an error . customizing error in workschedule.

But if i change the validity date of workschedule to 01.12.2012 and i generate it. it works really fine.

But client needs only from 01.01.2013, how to get that.

Any help

Thanks

Sriram