autoaccouting

 hi,all

      I want to  define autoaccounting in the receivable module.after I navigate to the autoaccounting window and select an opertation unit,then it is up to the type of account to define.But I can't  find the type of bill receivable.The lov  don't include this type.how I add the type of bill receivable to the LOV.hope someone give me some address.thank you very much!

   regards

    fanny