CaptainCumcake

I have this problem where when i launch tekkit classic (or any modpack, i play tekkit classic more) I can click on singleplayer or multiplayer or options or whatever and it will take me to the appropriate page. But, i cant click on anything else. When i hover over Create New World, it lights up but clicking it doesn't do anything. Same with any other page after the main menu. I don't get what to do. Video would be attached but this forum doesn't allow them.