This message pops up every time I start the game with the hacked client (the custom client, of course), and I get a white screen in the minecraft window. Don't worry, I downloaded all the files correctly and put them in their correct places, I've done this before.
The actual message box looks like this:
|Failed to start Minecraft [X]
|(insert big red "X" symbol here) org.lwjgl.LWJGLException: Pixel format not accelerated
| [ OK ]
I would greatly appreciate it if someone could tell me what to do. And I apologize in advance if this problem has already been solved, I looked for a solution and saw nothing related.