to specialist what is happened?????

HI ALL
I designed a timer with pic 16f84a with education poard (inexpensive poard)
and it work correclt?
but if I BUT THE timer in any place has motor , timer will work incorrctly????/???????
but i find the soulution
if i but earth line on (- vin)for the power supply
the timer work corrctly?????????????

again
if I put my finger on the pic16f it dosenot work correctly????remember
i touch ametal peice .

Man you type horribly...

We can't help you unless you upload a schematic and/or a picture of your circuit board. Do so, and maybe we can help you.