After payment of interest of a loan account using a credit note voucher in tally 9... don't any one thinks that we have to adjust the cash account by passing journal to show the payment is done from cash account...

I have duely activated all the interest calculation(advanced parameters) option in tally 9 series 2 and open an account (debo master) as loan account(liability) and activated 30 day interest calculation option @ 7%... but when I go to: display> statement of account>interest payable... it show the interest calculation as per calender month... rather than 30 day assumed months... *** help me with the solution