follow the step:-
go to desktop->My computer-(right click on)->properties->then go HARDWARE tab->Device manager-> now u see a window of Device manager
then go to Ports->Communication Port(double click on it and Open).
after open u can see a Communication Port properties.
go the Port Setting:----
and now increase ur "Bits per second" to 128000.
and "Flow control" change 2 Hardware.
apply and see the result
please comment me.