Error when creating a leave request

Hi Experts,

I am setting up ESS (WDA) EHP5 on Portal 7.3. I and ERP6. I got this error when clicking on the calender to create a leave request:

No data for infotype 0001, personnel no. 00000000 in period 2012-01-24 - 2012-01-24. (Modifiers not found)

Got the same error on the portal as well as using PTARQ

I did customizing for Leave Request and there are also data for IT0001.

Is there anything else missing?

Please advise.

Thanks.