I had T1-C7 neck fusion surgery back in July. Since then I have been riding our Aprilia SportCity scooters. I've been backing the airhead out of the garage and starting in the driveway every couple of weeks. I took it for a short ride a couple of months ago, but only got a few miles and had some neck pain, so I came home. Today I decided to give it another go and headed out on a ride. I was a few miles from home and went to up shift after downshifting for a car turning in front of me but I couldn't get it to change gear. I slowed down and tried downshifting and no luck there either. I returned home. The transmission is stuck in 2nd or 3rd gear. The shift lever turns the shaft going into the transmission but no clicks. Any ideas what the problem is and fixing solutions? Did I cause this by not riding for the past 6 months?