Something preventing shader texture pack from loading

When I try to load up a shader texture pack in my global textures, it just freezes there and never stops. Because of this, I waited for an hour and it never finiched loading. When I restarted minecraft, my texture packs crash. Before the « Loading Textures » thing, this wasn't a problem. I don't know if it's the texture pack that dose this but this wasn't a problem before. Please fix this. PS: Sorry for the French screenshot.