Bank Accounts priority remains '1' for multiple accounts

 Hi All,
I have a problem in creating multiple Bank Accounts for Vendors. I use the API (IBY_EXT_BANKACCT_PUB.create_ext_bank_acct) for creating the bank accounts for the Vendor and using the API (IBY_DISBURSEMENT_SETUP_PUB.Set_Payee_Instr_Assignment) to set the priorities of the Bank accounts but when I run the those API'S the priority remains same (For Example '1') for both accounts.

Any suggestions why it is happening and also can anybody tell me which tables to look for seeing the priorities of the banks accounts for vendors.


Please suggest.


Thanks