I can't get Remote Device Anywhere working from Linux.

I get these errors from Webstart:

Exception:
Code:
com.sun.deploy.net.FailedDownloadException: Unable to load resource: http://rda.cellulardata.com/loaddevui/588?filename=DdcDevUI_fn_4.22.3110.jar&login=misthalu&password=encrypted_password
	at com.sun.deploy.net.DownloadEngine.actionDownload(DownloadEngine.java:1372)
	at com.sun.deploy.net.DownloadEngine.getCacheEntry(DownloadEngine.java:1525)
	at com.sun.deploy.net.DownloadEngine.getCacheEntry(DownloadEngine.java:1503)
	at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(DownloadEngine.java:1609)
	at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(DownloadEngine.java:1534)
	at com.sun.deploy.net.DownloadEngine.getResource(DownloadEngine.java:217)
	at com.sun.javaws.LaunchDownload$DownloadTask.call(LaunchDownload.java:1983)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
Wrapped exception:
Code:
java.io.IOException: Server returned HTTP response code: 503 for URL: http://rda.cellulardata.com/loaddevui/588?filename=DdcDevUI_fn_4.22.3110.jar&login=misthalu&password=encrypted_password
	at sun.reflect.GeneratedConstructorAccessor3.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at sun.net.www.protocol.http.HttpURLConnection$6.run(HttpURLConnection.java:1491)
	at java.security.AccessController.doPrivileged(Native Method)
	at sun.net.www.protocol.http.HttpURLConnection.getChainedException(HttpURLConnection.java:1485)
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1139)
	at com.sun.deploy.net.BasicHttpRequest.doRequest(BasicHttpRequest.java:229)
	at com.sun.deploy.net.BasicHttpRequest.doRequest(BasicHttpRequest.java:113)
	at com.sun.deploy.net.BasicHttpRequest.doGetRequest(BasicHttpRequest.java:78)
	at com.sun.deploy.net.DownloadEngine.actionDownload(DownloadEngine.java:1182)
	at com.sun.deploy.net.DownloadEngine.getCacheEntry(DownloadEngine.java:1525)
	at com.sun.deploy.net.DownloadEngine.getCacheEntry(DownloadEngine.java:1503)
	at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(DownloadEngine.java:1609)
	at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(DownloadEngine.java:1534)
	at com.sun.deploy.net.DownloadEngine.getResource(DownloadEngine.java:217)
	at com.sun.javaws.LaunchDownload$DownloadTask.call(LaunchDownload.java:1983)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.io.IOException: Server returned HTTP response code: 503 for URL: http://rda.cellulardata.com/loaddevui/588?filename=DdcDevUI_fn_4.22.3110.jar&login=misthalu&password=encrypted_password
	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1436)
	at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:379)
	at com.sun.deploy.net.BasicHttpRequest.doRequest(BasicHttpRequest.java:190)
	... 14 more
So I tried downloading the jars instead and run it from desktop. That helped. Now I could start the app, and it even said it connected to the device, but only for a short while, then it disconnected again.

Anyone has any ideas or suggestions I could try?