Switching to Chinese input crash/freeze OSX Lion

Just upgrade MacBook Pro 13 early 2010 from Snow Lepoard to Lion. Now everytime I switch from English to Chinese (Zhuyin), the whole system become freeze. Nothing works, not even force quit. I need to press and hold the power botton to restart the computer.

I did "repair permission" and "verify disk", it found nothing wrong. I am reinstall the Lion now. Anything I should try if reinstalling fails?

TIA