Are you sure your drivers are correct? Maybe try an older driver?
Can you post ur specs of ur pc

Also recheck that you did everything correctly in this just try it all again to be sure so we can rule everything out

7. When I start FGunZ I get the error 'Failed to initialize DirectX'.
This error can be fixed with a few solutions.
Solution #1;
- Head over to your FGunZ destination folder.
- Search for the file named "Config.xml" and delete it.
- Launch FGunZ using the Launcher.
Solution #2;
- You still haven't installed DirectX on your computer.
- Click this link here to download the latest DirectX
- After you downloaded it, install it and run FGunZ using the Launcher.
Solution #3;
- You still haven't installed Net Framework.
- Download it from here
- Install it and run FGunZ using the Launcher.
Solution #4;
- You still haven't updated your VGA drivers.
- If you don't know what Video Card your computer has then do the following;
- Hold the windows button on your keyboard and press R.
- A box named "Run" should prompt up: http://i.imgur.com/ss2Ybot.png
- Type in "dxdiag" and hit enter > click Yes if a box appears.
- Wait for the tool to load and afterwards click "Display" > http://i.imgur.com/KxVA1fs.png
- There you should see the name of your VGA.
- Simply copy it's name and paste it in Google for instance > "AMD Radeon R9 200 Series Drivers"
- Download the latest drivers, install them and restart your PC.
- Run the FGunZ Launcher, it should start loading.