Unable to find main class

Hello
I am running Windows 2000 and can not launch Jdeveloper. I get two messages:
1. The Oracle Java Virtual Machine is not installed.
2. Unable to find main class, Class specified is: oracle/ideimpl/IdeMain
I have downloaded jdev9i_902.zip and unzipped it to e:\jdeveloper.
I downloaded jdk1.3.1_03 and jre1.3.1_03 annd installed them. Next I set JAVA_HOME to e:\jdk1.3.1_03 and added e:\jdk1.3.1_03\bin to my PATH.
I changed SetHavaHome in jdev.conf to:
SetJavaHome e:/jdk1.3.1_03
If I leave this commented out I do not get error #2 listed above, but nothing else happens.
I also left SetUserHomeVariable JDEV_USER_DIR blank and also tried SetUserHomeVariable JDEV_USER_DIR e:/jdeveloper.
When I run InstallOJVM.bat I get the following
E:\jdeveloper>InstallOJVM.bat e:/jdeveloper
Error: cannot find JDeveloper installation in "E:\"
I notice that the Install.html document makes a reference to <jdeveloper_root>\jdev\bin\jdev.conf. All the files were unzipped in one directory. There is not a directory structure (ie \bin).
Oracle is installed on a network server. I have the Oracle 9i client on my workstation. Does Oracle need to be installed locally?
Can anyone tell me what I am missing?
Thanks

This is the key piece of information:
I notice that the Install.html document makes a reference to <jdeveloper_root>\jdev\bin\jdev.conf. All the files were unzipped in one directory. There is not a directory structure (ie \bin).
If you unzipped jdev9i_902.zip using WinZip, be sure the "Use Folder Names" option is checked at the time you extract the archive, so that the directory structure will be preserved during extraction. You should be able to verify in WinZip that jdev9i_902.zip does have a directory structure.

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Cannot find main class

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* Copyright (c) 2000 David Flanagan. All rights reserved.
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Oh, no wonder I have such low "reading for comprehension" scores - that was a "package" statement, not an "import".
Thing is, your class would compile with this package statement there - but, the interpreter wouldn't be able to find it, 'cause the compiled class would be in a package called com.davidflanagan.examples.datatransfer accoding to the class file, but your interpreter would be looking for the class in the default package (if that makes sense). If executed on the command line you would likely see something like:
Exception in thread "main" java.lang.NoClassDefFoundError: SimpleCutAndPaste (wrong name: com/davidflanagan/examples/datatransfer/SimpleCutAndPaste)
[pre]
Lee

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Hello everybody
I know there's tons of threads on this subject but none of them seem to be quite like mine.
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Manifest-Version: 1.0
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it has two extra lines at the end.
I read on the other threads that I also needed a .bat file (don't know quite why) so I created one. It looks like this:
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java -jar serverapp.jar
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at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
I don't know what is going on here.
Any help would be really appreciated
Thanks.

Thanks for the reply martin
what jar file are you refering to? I only have one jar file wich is "serverapp.jar" and that's the one I want to run.

Unable to find main class

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