Input the correct company code that you wanted to check.
The printscreen above show that current period is 04-2010 and previous period is 03-2010, very obvious.
The tick on allow posting to previous period meaning that you able to do posting for both 04-2010 and 03-2010
If you want to open posting period for MM, kindly follow this link http://rukawaw-tb.blogspot.com/2010/08/set-posting-period-for-mm.html
