I have a 7th gen 2000 Celica and my handbrake does not lock up at all. even when I am on flat ground, I put up the handbrake in drive and as soon as I take my foot off the brake it moves forward. Sometimes when I put it up it somewhat holds but it makes a creaking sound towards the back of the car. I thought that my handbrake would be going too high but when I adjusted the nut in the center console for the handbrake yet it still doesn't lock. Does anyone know what I can do?