Sunken tires

First the Aircraft: - Download from Props Pg 8 - "FS2004 AT6D Trainer Package" 3 variations
Second the problem: The tires, both the tail and the undercarriage, are slightly sunken into the tarmac. When the plane is taxiing, I often get sparks and smoke from the tail wheel when the brakes are applied, just as if the metal part of the wheel is hitting the ground. It's even more spectacular when I land and the airplane bounces! Is there a simple method to correct the height of the wheels and counteract this phenomenon?
Second the problem: The tires, both the tail and the undercarriage, are slightly sunken into the tarmac. When the plane is taxiing, I often get sparks and smoke from the tail wheel when the brakes are applied, just as if the metal part of the wheel is hitting the ground. It's even more spectacular when I land and the airplane bounces! Is there a simple method to correct the height of the wheels and counteract this phenomenon?