Texture pack lag

Hello,

I've installed the R3D Craft texture pack with Optifine HD but when I launch the game, it takes like 1min to launch and in game I play whit like 1~2fps.
I tryed to increase the video settings by disabeling useless options but it dones't do anything.

PLease help.

Yeah was that, I installed 512x512 ... I got now 128x128 and it works perfectly.
Thanks

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