I purchased a new 2009 ford escape in december 2008. it has about 25000 miles on it. in the last two weeks, i have been having issues with brake. when i backup vehicle, sometimes the brake is stuck, and cannot be pressed down anymore, it feels like the brake is locked. the vehicle will continue move as brake is locked. this situation has happened twice today as 05/10/2010. one was in the morning and another was in the afternoon. the vehicle hit the street curb as it cannot be stopped. i was lucky as there was no traffic or people behind of me. *tr