Obviously you have a problem with your Java installation or your permission setting.
Please search the web for a more general solution, and come back when you can run other .jnlp
Be aware that the Jar is signed by myself, and not endorsed by a web authority. That may or may not cause problem if your setting is too paranoiac ;).

these are the errors i get after java 6 pops up when i try to run it in terminal the way you said

under exceptions it said this.

JreExecException[ Could not launch the Java Runtime Environment version /usr/lib/java]
at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(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)

under wrapped exceptions it said this

java.io.IOException: Cannot run program "/usr/lib/java": java.io.IOException: error=13, Permission denied
at java.lang.ProcessBuilder.start(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at com.sun.javaws.JnlpxArgs.execProgram(Unknown Source)
at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(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)
Caused by: java.io.IOException: java.io.IOException: error=13, Permission denied
at java.lang.UNIXProcess.(Unknown Source)
at java.lang.ProcessImpl.start(Unknown Source)
... 12 more

I did what you said and ran that in the terminal and java 6 popped up then I got errors saying it cant run java runtime environment /usr/lib/java

This mean that you haven't installed java webstart or don't have the right mine type for ".jnlp".
Try this in a terminal window :

javaws http://photoscreen.free.fr/gimysweb.jnlp

it didnt show the txt sighs i guess the message thing on here edits it out

as i said previously I have slackware 13.0 and it does tell me that i have java installed but even that web version you sent me shows txt instead of running. The web version shows this .

This XML file does not appear to have any style information associated with it. The document tree is shown below.

−

Give me your skin
Give me your skin

Give me your skin
Give me your skin

−

You can play the latest version of the game on-line :
http://photoscreen.free.fr

It is webstart so it should be easy to launch if you have java installed.

im unable to play this game it doesnt run by using the commands in the readme file so instead i added the .sh to the linuxjava file and then tried running it as a sh file .Then I ran the file and it went to a full screen as was just a blank screen but when i alt tabbed out of the program it went back to a window mode as im using other apps the program shows up as running but when I click the window of it to play it goes back to full screen again and then is a blank screen once more . I am running slackware 13.0