Help to correct the timer code ATtiny 2313

Hello all
I got this circuit from internet.. Its a good timer. Proteus simulation works great.. But the hardware not work well... The timeing is not correct.. When the count down start, the display count as 5 second = 1 second. How to correct these error?

I am fresh in Programming and I dont know even write a line of code.

The necessary file are attached.....

hi

I find something in the code...

Delay100us:
ldi r17,10 ; manoj edited actual value is 98
delay1us: ; 98*1.017 microsec
nop
nop
dec r17
brne delay1us ; => 5 clock-cycles => 1.017 microsec
ret



any hope?

thanks in advance.......