xXSweetCakeXx

I got a problem... I just can't open modpacks (it just work with vanilla modpack, and I never tried with the ones that come with launcher) When I touch play in any modpack, it dosen't open Minecraft (I think is because the version is 1.8.3 and the mods are 1.7.10) I tried all the opitions of java settings, and IT JUST COME 1.8.3 (and I want to play on 1.7 version) I got 64 bits computer and I got java 7... I need help! I'm using the portable version (don't know why it was installled as portable, but it dosen't interfere, right?) Here are the names of my modpacks: MasterCraft-FanMaker and CasalCraft. Hope you can help me...