error while FB50 after upgradtion to EHP5.

Dear Guru's,

I am getting error " Constant Z1 for Ledger !* does not contain any value Message no. GLT2301" while tring to post data through FB50. i found note 1039934 but this is supporting upto release 603 only we are currently on release 605.so this note is also not helping me.

We have maintained Constant as Z1for non assigned accounts.

can you suggest what exactly is problem or any other valid SAP Note.