Account Number For Transaction Type Exchange Rate Loss

Dear all

I am facing an error

While I am invoicing sales order . with me select Exchange Rate Loss & Gain account in the following:-

1- General Ledger --- > Setup --->Currency --->  Currency revaluation accounts.

2- General Ledger --- > Setup --->Ledger .

3- General Ledger --- > Setup --->Posting --->Account For automatic Transaction .