Older Cat Less Friendly Since Getting a Kitten?

Hey thank you and maybe you can help. I have a female kitten that was found on Thanksgiving of 2012 (she was 7weeks according to the local vet) at the same time already having a 2 year female in the house. The 2 year old was terrible at first hissing all the time at me and the kitten. Time has passed (it's now July 2013) and the older cat is more tolerant of the kitten being around.

They play once in a while and other times the older cat beats the kitten up. She never hurts her or even brings her claws out, the kitten even goes back for more thinking the older cat is playing. The 2yr old then hisses and meows and kitten runs away after a few swats, this happens often but no where nearly as much or as violent as before.

The 2yr old doesn't however come around me at all nor does she really ever come in my room anymore. The older cat was always near me before the kitten came around. I still pick her up and pet her constantly, I'm always showing the big one affection and she reciprocates until kitten comes around. Kitten is now almost 10 months old and I'm not sure what to do. I would love for my 2 yr old to be my same cat again. What do I do? I want to keep them both with their normal personalities.

By Devin