Offcycle payment not coming in /559

Hi Gurus,

I had maintained the payment amount in 0267 and when I run payroll the amount maintained in the0267 Infotype is not cumulating in /559 for payments.

How can we post the offcycle payment to FI. Is it possible to do so and if yes how can we do that ....

Is there any operation top calculate the days between the dates?

Please suggest how this