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javaw and java -jar  RSS feed

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I am making an installer. The installer is packaged in a jar. It creates a jar file that contains the content to be installed and appropriate extractor classes. When I execute the jar using the command line, I can use two different commands:
"javaw myJar.jar"
"java -jar myJar.jar"
When I use javaw, I get a message box saying no main class is found. When I use java -jar, the installer runs normally. When I d-click the installer jar, and try to make a jar a dos window opens up with the header "c:\jdk1.3.1\bin\jar.exe" and does nothing from that point on. It will close normally though.
Any ideas on why this is happening?

Jason R. Kretzer
Java Programmer
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Did you specify the main class in the manifest file for your jar?
You might check out this link http://developer.java.sun.com/developer/qow/archive/21/index.html
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