HELLO EVERYBODY!

I have a problem with topcoder contest applet:

Application Error

Unable to launch the application.

Name" Competition Arena

Publishe : Topcoder , Inc.

Location : http://www.topcoder.com

detailes :

java.io.FileNotFoundException: http://www.topcoder.com/contest/classes/7.0/arena-client-7.0.6.jar at sun.reflect.GeneratedConstructorAccessor2.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection$6.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source) at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at com.sun.deploy.net.BasicHttpRequest.doRequest(Unknown Source) at com.sun.deploy.net.BasicHttpRequest.doGetRequestEX(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.checkUpdateAvailable(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.isUpdateAvailable(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source) at com.sun.deploy.cache.ResourceProviderImpl.getResource(Unknown Source) at com.sun.javaws.LaunchDownload$DownloadTask.call(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.io.FileNotFoundException: http://www.topcoder.com/contest/classes/7.0/arena-client-7.0.6.jar at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) at java.net.HttpURLConnection.getResponseCode(Unknown Source) ... 11 more

with JAVA 7 in windows 8

PLZ help me!

Thanks.

GOOD BYE.