Solution : https://service.sap.com/sap/support/notes/1380045 (SAP Service marketplace login required)
Key words : 
performing fund usage balancing, fund usage balancing, opposite sign solution, terms accrual posting, values posting, accrual reversal, account symacctkey, negative signs, positive signs, account accrualacc
Related Notes : 
       
| 1304447 | SAP CRM 2007 - SP-Stack 06 |