error while installing htmldb from the companion cd (10R1)

Hello team,
i needed to install apex on an existing 10gR1 database running on Windows Server 2003 SR2, so i started off by installing the companion cd stuff coming with that release.
Oddly enough, i successfully installed the http server but the htmldb installation keeps failing.
Looking at the log, the first unusual condition i spot, as i've done this operation many times over the years, is in the command generated by the installation program:

'C:\oracle\product\10.1.0\cd\jdk\jre\bin/java.exe -classpath C:\oracle\product\10.1.0\cd\marvel\jlib\htmlDBConfigClasses.jar;C:\oracle\product\10.1.0\cd\jdbc\lib\classes12.jar;C:\oracle\product\10.1.0\cd\jdk\jre\lib\rt.jar;C:\oracle\product\10.1.0\cd\jlib\ojmisc.jar;C:\oracle\product\10.1.0\cd\oui\jlib\OraInstaller.jar; htmlDBConfig C:\oracle\product\10.1.0\cd lrserver01 1521 lanza SYSAUX Valore protetto. Registrazione non necessaria Valore protetto. Registrazione non necessaria en,it HTMLDB C:\oracle\product\10.1.0\cd\marvel'

Avvio dell'output dal processo generato dinamicamente:
----------------------------------
java.io.IOException: CreateProcess: env error=2
[Ljava.lang.String;@1e5e2c3

if i execute the command above from the command line an additional message is returned:

"version mismatch!"

However i am not clear as to what kind of version it refers to... java or what else?

I checked another installation on a similar machine and i could not see any significant difference between the two besides a different Windows 2003 service pack.

Also, in the log file all the subsequent attempts to connect to the database fail with SP2-0640 and the cause seems to be ORA-12545.

Any clues?

Thank you,
Flavio

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