Actually thats not the problem, as you should know minecraft changed the OpenGL version and my computer can't run higher, if you have a low graphic card, at version 1.7.2 it will be appearing a message warning that you will not be able to run other versions, and I really can't, as the game crashes on 1.7.4 and other versions.
Then I decided to make the game for 1.6.4 and then make an update for 1.7.2 and I'll be updating this 2 mod versions, I started with 1.6.4 because 1.7.2 got a little more lag, nothing that I can't run, I can run it but to run with mods I have to use Optifine, I always use Optifine when I use mods, I know that lots of people are using 1.8 and now there is coming the 1.9, but actually is better to make for 1.6.4 and 1.7.2 for lots of reasons, for example 1.6.4 and 1.7.2 almost everyone can run it, and there is lots of video tutorials for 1.6.4, 1.6.2(wich works in 1.6.4 too) and 1.7.2, as I said, I'm a new modder and almost everything I've done was by watching videos.