buk lao

i allready tried that and it still is not working. the wierd thing is that it only did it for one of my worlds.

Launcher Version: 1.0.1.3 Operating System: windows 7 Java Version: 7 Antivirus Program: Description of Problem: i placed one block in my house and the game froze for a second and then every block changed into the vanilla version. i checked the launcher and i am on the technic pack. i cannot figure out what to do!!! Error Messages: Error Log: