If the automatic adjustment is still working, you should be able to get it to adjust itself by 1) Flying backward in reverse and 2) slamming on the brakes.
Shop Manuals, Brochures:
www.kenmcgeeautobooks.com
If what Geeky said does not work than your E-Brake cable has stretched or become worn, for the most part what this means is you will probably have to go beneath the car and adjust the tightness of the cable near the rear of the car. Have heard of people doin it but have never done it so maybe someone else can shine some light on it for ya
