he problem is there is no HotSpot Server VM on the JDK 1.3.1 for Windows.

You can see it from the following output:

------------
C:\WINDOWS>java -version
java version "1.3.1"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1-b24)
Java HotSpot(TM) Client VM (build 1.3.1-b24, mixed mode)

C:\WINDOWS>java -server -help
Error: no `server' JVM at `C:\Program
Files\JavaSoft\JRE\1.3.1\bin\server\jvm.l'.

C:\WINDOWS>java -?
Usage: java [-options] class [args...]
           (to execute a class)
   or java -jar [-options] jarfile [args...]
           (to execute a jar file)

where options include:
    -hotspot to select the "hotspot" VM
                  If present, the option to select the VM
                  The default VM is -hotspot.

    -cp -classpath <directories and zip/jar files separat
                  set search path for application classes
    -D<name>=<value>
                  set a system property
    -verbose[:class|gc|jni]
                  enable verbose output
    -version print product version and exit
    -showversion print product version and continue
    -? -help print this help message
    -X print help on non-standard options
---------------