I'm trying to make a Purchase Receipt but the OpenERP does not list the account options from required field on bill information lines.

Steps to reproduce:

1. The user goes to Accouting > Suppliers > Purchase Receipt;
2. The user fill up te Supplier, Account, Due Date;
3. The user goes to Bill Information tab;
4. The user clicks on Add an Item button;
5. The system add a new blank line;
6. The problem happens right here when the user try to select a account to the bill information row. The OpenERP doesn't show the any account. Even the account its a required field. I cant save the Purchase Receipt

Why the OpenERP doesn't show any account ?