Inventory Valuation can not be done

Hi Experts,

I am encountering serious problem in re-valuating a material, Issues are as follows,

Client Wants to Re-valuate a certain material In their 3 Plants within 01.04.2013 to 31.06.2013,

> Client want us to re-valuate the Issue in ONE GO,

> MB5B we are taking out the stocks qty and value on that particular month and for a plant,

> As per the the report fromMB5B, the difference from SAP & Tally Stock and value we need to maintain in SAP,

> But When we are doing MR22 wither the stock value is raising up or down for some materials,

Please help me, I am unable to sort out the issue,

If any other information needed please reply me as soon as possible,

Thanks & Regards,

Arghyajit Chakraborty