[solved]Installing optifine results in grey screen?

[Purplesmart]

• I downloaded and installed optifine HD U D2 1.5.2 from http://optifine.net/downloads.php
  
• I used winrar to move the files to bin\modpack.jar so that it appears as:
  
• I deleted the META INF folder
  
• I started Big Dig via the technicpack launcher and I get this grey screen:
  

The grey screen lasts forever. It doesn't appear when I use the original modpack.jar

Does anyone know what's wrong?

[Calvariae]

Does anyone know what's wrong?

Derp. The fact that you're using a 1.5.2 mod might be what's wrong. See this thread.

Next time you have a problem, try searching around and seeing if other people are having the same problem/trying to do the same thing as you. Usually helps

[Purplesmart]

Thanks, I thought I needed the latest version.