posting period error

Dear All,

I am facing the folllowing problem....

<b>Posting only possible in periods 2007/12 and 2007/11 in company code XYZ</b>

Message no. M7053

i have changed the current period to 12/2007 from MMPV, but still i am getting this error....

Kindly help me out.......

cheers

Riaz