For some reoson my modded minecraft wont load. Why?

so i download on mod, the "cars and drives" mod because it kept breaking my game with messed up textures but after i completed the installation i click play on minecraft forge and as usual it comes up with the mojang sign but underneath there is an anvil being hit by a hammer with a loading bar and i don't know why but it always loads to 2 then stops, any reasons why or how to stop it?

Read more: For some reoson my modded minecraft wont load. Why?