Moopiia

It's been now 3 days that I have a problem with forge and my mods, I always used 1.7.10 but since thursday I'm forced to use the 1.8 because all of sudden all the other versions don't work and I don't know why, when I'm downloading an other version of forge and even the 1.7.10 it doesn't work, it doesn't crash it just doesn't work. Only the 1.8 ( I don't like this version) that I always used, work but all the others versions doesn't work. I searched everywhere for a answer but didn't find anyone with the same problem