ZGameing

Title: TEKKIT WORLD CRASH Version: 3.1.3 OS: mac os x lion 10.8.3 Java Version: 7 Description of Problem: When playing on a world it randomly crashes n shows me the log for only a split second then i close tekkit n when i try to enter the world agin it crashed n does not show me the log so i have no idea what is causing {it was ok with me on some creative worlds but it crashed on a survival world that I had 64 red matter legit so plz reply soon} Error Messages: Error Log: no log