f.52 for calculating interest

hello experts

I want to calculate interest accrued for a loan received so I am using f.52 but after customizing it is calculating intetest not for the time passed but it is using amount of interest for remaining days of year not from day of receiving loan until day of executing f.52. please guide me where I have made mistake or otherwise what is reason behind calculating interest for days which yet to be come.

thanks and regards