I was able to do so before, but, after updating to the 1.0,8 version of the modpack, I am unable to add in additional mods into the 'mods' folder of the ATM7 distribuation. When I add them in--the 'DragonSurvival' and 'CustomPlayerModels' mods, specifically--the modded launcher tries to launch Minecraft and simply hangs. There is no error code, and I have to manually kill the process via Task Manager.

Is there any assistance that someone can provide for this issue?