I replaced faulty brake booster with new booster?

That has nothing to do with the power booster. Brake fluid is being trapped and it can't flow back to the reservoir. First, when they lock up again, loosen the steel lines at the master cylinder. If that lets them release you have brake fluid that is contaminated with a petroleum product. That will be a very expensive repair. If they don't release it is more likely you have just one caliper staying applied and you can identify that by which wheel gets real hot. Open the bleeder screw on that caliper. If that lets it release the most likely suspect is a constricted rubber flex hose. Here are the booster replacement instructions in the diagrams below. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.