Mac OS does not open TopCoder Arena to open

Question

I\'m running Mac OX 10.7.4 with the latest version of Java. I wanted to access TopCoder\'s Competition Arena, so I downloaded the .jnlp and tried to open it. However, I keep get

Answer 1

I have meet your problem today.The answer above is right,but you need to make sure you have the root
privileges. so,the solution is

sudo javaws ContestAppletProd.jnlp

that really work.