1. Did you make sure Optifine is above the Shaders mod in Magic Launcher?
2. Is the status of both mods in Magic Launcher OK?
3. Is your Minecraft .jar the 1.5.2 version?
4. Do you consider your computer powerful enough to handle Shaders?
5. Did you correctly extract the individual Shaders from the Shaders pack and put them in the shaderpacks folder?
6. Did you look in the GLSL forums for answers? 7. Is your Optifine D3 Ultra?
I'm not sure why you made a new thread and if you have the permission of karyonix to publish it as a new mod but here he posted the exact the same glsl shaders mod (the archiv has the same size, name, files...)