little starting issues, please help...

block the wheels. crawl under there and loosen the adjuster that is connected to the shifter linkage rod at the shifter arm on the trans. get back in the car and push your shifter all the way into park. crawl back under and pull the shifter arm on the trans all the way back as far as it will go , then tighten it back up. if that doesnt do it, then the switch probably bad