Java APIs

Everytime I try to open a jnlp file i get the Unable to launch application error. I have no clue how to fix this and would like to know a solution. I currently have JRE 6 Update 6. Here is the error info.

java.lang.Exception: cache failed forhttp://pokeglobal.sourceforge.net/game/beta.jnlp
at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Java Web Start 1.6.0_06
Using JRE version 1.6.0_06 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\MILTON
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
m: print memory usage
o: trigger logging
p: reload proxy configuration
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
0-5: set trace level to <n>
----------------------------------------------------
#### Java Web Start Error:
#### cache failed forhttp://pokeglobal.sourceforge.net/game/beta.jnlp