Plugin: Could not load Resource

I experience a strange behavior with my plugin when using the SmartClient. Since I did not use the SmartClient for a long time I cannot tell since when this happens.

This is the exception:

com.sun.deploy.net.FailedDownloadException: Could not load resource: (http://192.168.1.136:8082/plugins/MyPlugin.jar?version-id=1326852113452, 1326852113452)
	at com.sun.deploy.net.DownloadEngine.actionDownload(DownloadEngine.java:1416)
	at com.sun.deploy.net.DownloadEngine.getCacheEntry(DownloadEngine.java:1569)
	at com.sun.deploy.net.DownloadEngine.getCacheEntry(DownloadEngine.java:1547)
	at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(DownloadEngine.java:1654)
	at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(DownloadEngine.java:1578)
	at com.sun.deploy.net.DownloadEngine.getResource(DownloadEngine.java:215)
	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:680)

The download works when i manually paste the link into my browser, but still this is reproducable. How can I debug this and figure out what problem occurs?

And the enclosed Exception:

java.net.ConnectException: Connection refused
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
	at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:432)
	at java.net.Socket.connect(Socket.java:529)
	at java.net.Socket.connect(Socket.java:478)
	at sun.net.NetworkClient.doConnect(NetworkClient.java:163)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:395)
	at sun.net.www.http.HttpClient.openServer(HttpClient.java:530)
	at sun.net.www.http.HttpClient.<init>(HttpClient.java:234)
	at sun.net.www.http.HttpClient.New(HttpClient.java:307)
	at sun.net.www.http.HttpClient.New(HttpClient.java:324)
	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:970)
	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:911)
	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:836)
	at com.sun.deploy.net.BasicHttpRequest.doRequest(BasicHttpRequest.java:179)
	at com.sun.deploy.net.BasicHttpRequest.doRequest(BasicHttpRequest.java:112)
	at com.sun.deploy.net.BasicHttpRequest.doGetRequest(BasicHttpRequest.java:77)
	at com.sun.deploy.net.DownloadEngine.actionDownload(DownloadEngine.java:1226)
	at com.sun.deploy.net.DownloadEngine.getCacheEntry(DownloadEngine.java:1569)
	at com.sun.deploy.net.DownloadEngine.getCacheEntry(DownloadEngine.java:1547)
	at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(DownloadEngine.java:1654)
	at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(DownloadEngine.java:1578)
	at com.sun.deploy.net.DownloadEngine.getResource(DownloadEngine.java:215)
	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:680)

Kind Regards,
Felix

Was a signing error, when starting the smart client with Windows i finally got a meaningful error message