The game crashed whilst initializing game The game crashed whilst initializing game Error: org.lwjgl.LWJGLException: Pixel format not accelerated

I can sign on to my account, but when I launch the game, it crashes with this error:
The game crashed whilst initializing game
The game crashed whilst initializing game
Error: org.lwjgl.LWJGLException: Pixel format not accelerated

I have NO idea what to do. I spent $35 of my own money on it and now I can't play it.... veryyyyy sad.