Aris Express 2.0 installation problems

Yes in fact when I click for details i found 2 register pages with following messages:

EXCEPTION:

com.sun.deploy.net.FailedDownloadException: Ressource konnte nicht geladen werden: http://download.ariscommunity.com/express.jnlp
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
 at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
 at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
 at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
 at com.sun.javaws.Launcher.launch(Unknown Source)
 at com.sun.javaws.Main.launchApp(Unknown Source)
 at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
 at com.sun.javaws.Main$1.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
 

CAPSULATED EXCEPTION:

java.io.IOException: Server returned HTTP response code: 502 for URL: http://download.ariscommunity.com/express.jnlp
 at sun.reflect.GeneratedConstructorAccessor1.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 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.doRequest(Unknown Source)
 at com.sun.deploy.net.BasicHttpRequest.doGetRequest(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
 at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
 at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
 at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
 at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
 at com.sun.javaws.Launcher.launch(Unknown Source)
 at com.sun.javaws.Main.launchApp(Unknown Source)
 at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
 at com.sun.javaws.Main$1.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: Server returned HTTP response code: 502 for URL: http://download.ariscommunity.com/express.jnlp
 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
 at java.net.HttpURLConnection.getResponseCode(Unknown Source)
 ... 18 more
 

I´m just user, I don´t know what it means.

Thanks in advance

Jacek