I installed Forge and made a separate profile named Forge to use it, set to the Forge version. When I try to start Forge it goes down, to a crash report.
http://pastebin.com/nZHjCKLq
That's the report. I don't know much about Forge, I'm sorry.
I also have a link to a screen cap of my profile settings for the separate profile, the one I named Forge.