Boisterous min pin puppy aggressive min pin *****?

my new pup is 10 weeks old and up untill the point i got him he was left used to playing with his mother and brother, so he is really springy and playful and keeps jumping on my 4 1/2 year old *****, who isnt used to other dogs, hes very boisterous and even when he gets a warning from her he doesnt quit, her warnings are now getting worse cos shes getting sick of him jumping on her, her warnings are getting stronger and even when she's had him pinned snarling at him, he STILL goes for more and i'm getting afraid she may bite him, please advise on what i should do, whenshe's nice she gets lots of praise and scolded when she's nasty, if he leaves her alone she leaves him alone