Problem solved, but for the future I'm recommedning launching older versions in different directories to prevent conflicts with actual version files.

To do it - go to launch options/installations tab, open profile settings and in game directory area change .minecraft to whatever you want.

can you give me a log? you can upload the text derectly into a responds or post it on a website,... also, try to reinstall minecraft, old minecraft version hate it when you have ever install forge into it.