Hello Kavian,
It is almost impossible to learn dog training via online forums. Much as I'd like to help, I won't do it. I need to see you and your pup in person to do anything meaningful.
Instead, please come along with your 4-mth pup to Central Park at 8am this Sat. I'm holding a free clinic for fosterers and adopters of MyAnimalCare.org. It's a no-charge clinic.
More info here:
http://www.myanimalcare.org/2009/11/...-mike-tan.html
I would like to keep the clinic attendees manageable, so please don't bring friends with their dogs. As for anyone else on this list, if you'd like to attend, please contact Kah Yein, founder of MyAnimalCare.org -- she will arrange for further clinics if necessary.
regards
miket