Running java command from DOS prompt

Hi,
When I run java from the DOS prompt (NT) in any other location than the JDK bin directory, I get the following error:
Error opening registry key 'Software\JavaSoft\Java Runtime Environment'
My understanding is to be able to run this from anywhere you need to add the tools.jar file to the CLASSPATH, which I have done.
There is no entry in the Registry for Software\JavaSoft...etc, has anyone any idea what my problem is and how I can solve it?
Thanks in advance

Hi,
I am running Java 2 SDK, Standard Edition Version 1.2.2 running on NT. It was installed as part of Oracles JDeveloper IDE and is running on NT.
All I want to be able to do is run java from the command line e.g. 'java myclass', to run a standalone Java program. I can run 'javac myclass.java' to compile the program without any problems, but my understanding is that to do this all I need is to have the '.../java1.2/bin' directory included in the 'PATH' variable, whereas to run the java runtime you need to include the tools.jar in the CLASSPATH variable.
As I said previously I can run the 'java myclass' command from the '../java1.2/bin' directory, just not from anywhere else. As for whats in the code, does not matter you should be able to type just java on the command line and it will come back with an error prompting for the class name. Here is an example of what happens:
I:\>java
Error opening registry key 'Software\JavaSoft\Java Runtime Environment'
However if I change to the correct directory, I get:
D:\oracle\JDev32\java1.2\bin>java
Usage: java [-options] class [args...]
(to execute a class)
or java -jar [-options] jarfile [args...]
(to execute a jar file)
where options include:
-cp -classpath <directories and zip/jar files separated by ;>
set search path for application classes and resources
-D<name>=<value>
set a system property
-verbose[:class|gc|jni]
enable verbose output
-version print product version
-? -help print this help message
-X print help on non-standard options
The contents of my PATH and CLASSPATH variable are shown below, Thanks again.
I:\>PATH
PATH=D:\oracle\BIN;D:\oracle\Apache\Perl\5.00503\bin\mswin32-x86;C:\Program Files\Oracle\jre\1.1.7\b
in;D:\oracle\ora8i\bin;C:\DMINT40\Win32\Bin;C:\WINNT\system32;C:\WINNT;C:\Program Files\Symantec\pcA
nywhere;d:\oracle\jdev32\java1.2\bin;d:\downloads\oraxml\bin;d:\oracle\jdev32\java1.2\lib\tools.jar
I:\>echo %CLASSPATH%
d:\oracle\jdev32\java1.2\lib\tools.jar;d:\oracle\apache\apache\htdocs\web-inf\classes;d:\oracle\apac
he\jserv\servlets

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