Bursitis pain?

I had a total hip replacement in Oct. 2008.  I am 58 but I recovered very fast as I am a thin person and was in good physical condition at the time of my surgery.   I have just exercised modertly and do muscle stretching every day.  I ride horses but that has never had any adverse effects on my hip.  After about 5 mos. post surgery, I started getting a shooting or burning pain in my front thigh and around my knee, never in the same place.  The pain is not severe but it makes me limp or at least favor my leg when I walk.  I was told by my orthopedic surgeon that I has a "touch of Bursitis" and gave me an injection that didn't help at all.  Over the last few months the condition has just seemed to come and go.  I try the IT band stretching exercises that my PT gave me but it's still there.  I'm getting really tired of it and want to be back to normal again after almost a year now.  If there are any other exercises I should be doing, I'd love to hear them.  I use ice on my hip when it hurts but I am allergic to Ibuprofen so I don't take anti-inflamatories unless I absolutely have to.   Should I be trying to strenghten my leg and hip muscles more or worry about stressing the bursa?  I tend to stay away from the cardio that I used to do (eliptical and bike riding) because that seems to make it worse.  I can't "rest" it any more unless I do "nothing" and that is not feasable for me right now.

It sounds like I have iliopsoas bursitisof the hip.  My surgeon said he had to cut the bursa when surgery was done.  I wish I knew how long it's going to take to heal.  The pain radiates down into my front and outer thigh and also around the knee.