formula resetting in crystal report

Hi guys. Please do help me to my problem. i do have Crystal report that computes the sum of two formula.

and i made the report show two groups in 1 page. all seems well but the summation of two formula never reset.

so if i got 100 total on 1st group(1st page) i also got 100 total on 2nd group(1st page) even though they dont have the same

values.

heres my total formula:

@DiscountTotalPesoSign

whileprintingrecords;

global NumberVar rt:= Sum({@Amount})-{@DiscountAmount}

and my reset is:

@reset

whilePrintingRecords;

global numbervar rt := 0;

i placed the reset in group header

and other data in group footer.

anyone out there pls help. thanks

-karlo