posting only possible in periods 2011/12 &2011/11 in company code 1001

Dear SaP Experts,

Please advise me that posting only possible in periods 2011/12 &2011/11 in company code 1001...we are facing in problem in SES.

Message No 7053

when i have done MMPI and enter company code then OSS note is coming 487381.....

when i checked MMRV then

current period 12 2011

previous period 11. 2011

last period in prev. period 11 2010

Then after MMPV IS not going to conversion...

Thanks

Mohit