i have inserted the keyframes as locrotscale but the model is just staying the same. I think it is because the person in the tutorial was useing a mac version of blender and i am useing a windows version
Mac, Windows, Linux will make zero difference.
There is too little information in your post to give any help.
Show a screencast of exactly what you are doing or post your blend to http://www.pasteall.org/blend/ and describe precisely what you are doing.
Why are you using a blender 2.59, a version that is 12 months old ?