Board Thread:Questions and Answers/@comment-31863149-20170429010806

I've been having a unique problem while playing Tekkit Classic. While playing, my character will freeze up. I can look around, squat, and break blocks, but I can't jump, type, walk, or pull up the options menu using ESC. I've tried to solve this issue by reinstalling the launcher and modpack, as well as changing my allocated RAM, but nothing has worked. Can anyone help me? 