FMJ2 - Transfer of Budget linkedto commitment

Dear All

We only want to carry forward the Open P/O with their budget to next fiscal year.Then I expected that budget linked commitment must be simultaneously transferred with commitment amount when I ran FMJ2 transaction.

But, while the amount of commitment for open P/O has been transferred successfully, the related budget amount for that open P/O was not transferred at all.

So when I run "FMRP_RW_BUDCON" transaction, it shows like this.

Consumable Budget Consumed Budget Available Amount Current Budget

=============== ============== ============= ===========

0 1,000 1,000- 1,000

As you see, the available amount has negative value.

Could anyone advise me where I have a problem for this?*