Java Development Tools

I have typed javaws url_of_jnlp in my CMD under windows 7, but i got the following error:-

CouldNotLoadArgumentException[ Could not load file/URL specified: url_of_jnlp]
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main.access$000(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Thread.java:722)

I have noticed this problem since i need java web start to be able to run an application, but when i tired to run this application , i will be asked to save a file named webstart.jnlp , instead of automatically lunching the java web start.

Might this problem occurs because i am having two java versions under the java folder one for the "C:\Program Files\Java\jdk1.7.0_06" while the other for "C:\Program Files\Java\jre7". But i need these two versions to be able to work on other applications

So what might be the problem?

Edited by: user11120147 on Sep 6, 2012 4:36 AM