Run in English based Linux (Ubuntu 9.10)

What steps will reproduce the problem?
Nothing special, just recompile it and run "java -jar YOYOPlayer.jar"

What is the expected output? What do you see instead?
$ java -jar YOYOPlayer.jar
Exception in thread "Thread-1" java.lang.NoClassDefFoundError:
org/apache/commons/httpclient/Credentials
        at
com.hadeslee.yoyoplayer.player.ui.CheckThread.run(CheckThread.java:71)
Caused by: java.lang.ClassNotFoundException:
org.apache.commons.httpclient.Credentials
        at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
        ... 1 more
Exception in thread "main" java.lang.NullPointerException
        at com.hadeslee.yoyoplayer.player.ui.Main.setLocation(Main.java:577)
        at java.awt.Window.init(Window.java:404)
        at java.awt.Window.<init>(Window.java:438)
        at java.awt.Frame.<init>(Frame.java:419)
        at java.awt.Frame.<init>(Frame.java:384)
        at javax.swing.JFrame.<init>(JFrame.java:174)
        at com.hadeslee.yoyoplayer.player.ui.Main.<init>(Main.java:68)
        at com.hadeslee.yoyoplayer.player.ui.Main.main(Main.java:86)

What version of the product are you using? On what operating system?
YOYOPlayer svn checked out on Jan 12, 2010.

Please provide any additional information below.
Possibly, it's quite similar with the guy who is using Fedora 10 .
Linux英文启动，但是安装了能够找到的全部中文包，就产生上
述error messages。
没有尝试用中文启动，是不是问题就会消失...但是从根本上��
�不会尝试用中文Linux
启动...
望提供英文版YOYOPlayer。中文Lyric的显示，无非是搜索字库，��
�该和启动
YOYOPlayer不挂钩。
Original issue reported on code.google.com by jp4w...@gmail.com on 13 Jan 2010 at 8:52
yp871207 / yoyoplayer

Run in English based Linux (Ubuntu 9.10) #49
