tibial tubular transfer and lateral release

Hi all...I live in australia and had the above surgery in jan 2010. Its been 5 months now and i still have difficulty in walking nornally. My operation on the right knee was due to the kneecap turning inwards about 21 degres. I was made to weight bear immediately post op as opposed to others having a knee brace. dont know if this was such a good thing! I had intensive physio for 3 months, however i still have knee and leg pain after 4 hours of walking. I find i have trouble walking normally. i feel i am using the muscles at the back of the leg and my kneecap seems to straighten as if there is no control over it. I walk on my heel with my foot flat on the floor. there seems to be no roll in the ankle or foot. I cant get rid of limp no matter how hard i try to walk normally. Has anyone else had any problems after this type of surgery? I am a very fit 50 yr old lady, that was very active before i had the knee problem. I used to love walking and running but that seems to be all behind me now. I am finding it hard to cope mentally with this affliction as i cant see any improvement in the near future. i have been back to my ortho several times and explained the problems i am having, he has offered no other solution but to keep excercising the leg. I had the tibial screws removed after 4 months and that has helped the discomfort in the leg. i would love to hear from anyone who is experiencing the same problems i am having and maybe suggest something i can do to start leading a normal life again.