Tekkit Lite quit unexpectedly while using a plug-in

Hi there,
I have this unexpected error when some application is closed by themselves and fails to relaunch. I have a MAC with OS X Leopard. Recently I have made changes to my settings and it’s probably that I changed something that I shouldn’t. Can anyone help me to repair my MAC ? What I changed that caused this kind of errors ?
Thank you !

Tekkit Lite quit unexpectedly while using the libjvm.dylib plug-in.
Click Reopen to open the application again. Click Report to see more detailed information and send a report to Apple.
Ignore Report… Reopen
