When you're playing old Alpha and some Beta minecraft versions,there ain't no sound,everything else is working perfectly.

The affected versions were:All the minecraft version under beta 1.3 expect for "Cave game"s,Classic and Infdev. However there have no a valid section for these but scaled from minecraft 1.5.2 to 1.6.2,so i have to choose Minecraft 1.6.2 that i ain't got no choice.