If your pack is working fine for other people, but not for you, the issue is almost certainly on your PC.
Things one should always try when a pack isn't working when it should:
- Reset the pack (reinstall from the pack settings menu)
- Provide your most recent FML log (/mods/latest.log) and your most recent crash report (in /crash-reports, assuming the client actually crashes) in a pastebin service (like http://pastebin.com ).
- Provide clear, specific, relevant information concerning the actions you take to reproduce the issue.
You need to do (at least the last two) EVERY time you ask for help, even in the same thread.