Creating Game Bug

Today i downloaded a few maps. When i press create game of that few particular map. It will bring me back to the create / join game menu screen again.

What problem is causing this?

These maps quite likely use the old handle bug exploit. Once that is replaced with new code, the map will work fine. If it's never replaced, the map won't run.

install 123 version of warcraft into separate folder to play such maps.