Physical Inventory on Back Date

Hi SAP Gurus,

We have a scenario, we have done physical inventory on Ist of this month and we have not updated the physical inventory in the system yet. Many material movement have also been posted since then. Now we want to post Physical Inventory in back date. But when we are posting physical inventory using T-code MI10, system updates inventory in current date. Inspite of mentioning counting date and document date 1.1.08.

What should I do.

Ishu