iced-tea doesn't work with local jnlp files

esti@estiXubu1215P:~$ java -version
java version "1.6.0_27"
OpenJDK Runtime Environment (IcedTea6 1.12.6) (6b27-1.12.6-1ubuntu0.12.04.2)
OpenJDK Server VM (build 20.0-b12, mixed mode)

when i launch

javaws /home/esti/java/cgoban.jnlp

this is the error

net.sourceforge.jnlp.LaunchException: Fatal: Read Error: Could not read or parse the JNLP file.
	at net.sourceforge.jnlp.Launcher.fromUrl(Launcher.java:491)
	at net.sourceforge.jnlp.Launcher.launch(Launcher.java:283)
	at net.sourceforge.jnlp.runtime.Boot.run(Boot.java:211)
	at net.sourceforge.jnlp.runtime.Boot.run(Boot.java:53)
	at java.security.AccessController.doPrivileged(Native Method)
	at net.sourceforge.jnlp.runtime.Boot.main(Boot.java:177)
Caused by: java.io.IOException: Can't connect to SOCKS proxy:Connection timed out
	at net.sourceforge.jnlp.JNLPFile.openURL(JNLPFile.java:282)
	at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:212)
	at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:188)
	at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:173)
	at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:159)
	at net.sourceforge.jnlp.Launcher.fromUrl(Launcher.java:477)
	... 5 more
Caused by:
java.io.IOException: Can't connect to SOCKS proxy:Connection timed out
	at net.sourceforge.jnlp.JNLPFile.openURL(JNLPFile.java:282)
	at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:212)
	at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:188)
	at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:173)
	at net.sourceforge.jnlp.JNLPFile.<init>(JNLPFile.java:159)
	at net.sourceforge.jnlp.Launcher.fromUrl(Launcher.java:477)
	at net.sourceforge.jnlp.Launcher.launch(Launcher.java:283)
	at net.sourceforge.jnlp.runtime.Boot.run(Boot.java:211)
	at net.sourceforge.jnlp.runtime.Boot.run(Boot.java:53)
	at java.security.AccessController.doPrivileged(Native Method)
	at net.sourceforge.jnlp.runtime.Boot.main(Boot.java:177)