Hi, i have a 1990 Corolla SR5. My front right tire has gone flat and I tried to put the spare in. I got all the lug nuts off and I raised my car, but I can't seem to get it off. I see that in the middle of the wheel seems to be some sort of lock(?) that the other wheels don't have. I remember in my old car the front right wheel was different from the others and required another piece of equipment. What can I do to get this wheel off? Thanks.