By posting a PICTURE of your code, you force anyone who wants to help you to then type in your code from scratch. Is there a good reason why you want to make it more difficult for someone to answer your question, when it was actually easier to paste in the text of your m-code instead?
If you want a fast, helpful answer, then make it easy for someone to help you.
As for what is wrong with your code, does laplace actually solve the differential equation? If you read the help for laplace, it is NOT an ODE solver. It computes the laplace transform, that is all. And while you can use laplace transforms to solve an ODE, you stopped there.
You might want to do some reading:
Or, at least read your own notes from class, where this was probably covered.
