JNLPException

I have installed jdk1.5.0.5

but when i try to start any jnlp application, it will throw exception:

JNLPException[category: Download Error : Exception: java.net.SocketException: Unexpected end of file from server : LaunchDesc:null ]

at com.sun.javaws.cache.DownloadProtocol.doDownload(Unknown Source)

at com.sun.javaws.cache.DownloadProtocol.isLaunchFileUpdateAvailable(Unknown Source)

at com.sun.javaws.LaunchDownload.getUpdatedLaunchDesc(Unknown Source)

at com.sun.javaws.Launcher.downloadResources(Unknown Source)

at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)

at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)

at com.sun.javaws.Launcher.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

Wrap Exception:

java.net.SocketException: Unexpected end of file from server

at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)

at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)

at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)

at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)

at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)

at java.net.HttpURLConnection.getResponseCode(Unknown Source)

at com.sun.javaws.net.BasicNetworkLayer.doRequest(Unknown Source)

at com.sun.javaws.net.BasicNetworkLayer.doHeadRequest(Unknown Source)