Forge 1.7.10 not showing up in the launcher after downloaded client version

i am trying to download forge 1.7.10 do i can play various mods including orespawn, but after i download it it says it successfully downloaded, but when i open the launcher it does not show up in the pop up bar, i have replaced the akka file and the scala files and i have already opened vanilla 1.7.10. What am i doing wrong/what do i need to fix and how?P.S i have successfully downloaded forge 1.5.2 so i do not beleive i am massing up the proccess unless downloading 1.7.10 is different. Much Thanks!