Tally 9- exchange rate trouble !

,
Plz help me in this...

Am using TALLY 9 with MULTI Currency.
and kept usd $ currency as my second currency !

-> After doing transactions of multi currency and inputting exchange rate as per the day... at the end of year am NOT getting the exact amount as per the prevailing exchange rate.

For example.
When I open the multi currency ledger Cash a/c and press f12-show only forex !
The forex amount, doesnt match with the primary amount.

Did you get me ?
Or should I send you screen pictures, maybe youll understand !

Thanks for your kind help may GOD bless you !