caljitsu

A friend of mine wanted to play attack of the B-Team, and hence had to download 64-bit Java (and uninstall all previous java versions), however since downloading it, he has been unable to play any packs online and when attempting to play vanilla, has been told that the authentication servers are unavailable, he is only able to play online when switching back to 32-bit and this then limits which packs he can play. If anyone knows how to fix this, their help would be greatly appreciated.