Weblogic 5.1

[Anver Sotnikov]

I'm trying to use cactus to test a servlet that makes a JDBC connection and it fails:

Testcase: testConnection took 1.503 sec
    Caused an ERROR
weblogic/jdbc20/jts/Driver
java.lang.NoClassDefFoundError: weblogic/jdbcbase/jts/Driver
    at java.lang.ClassLoader.defineClass0(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:248)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:297)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:286)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:253)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:313)

And problem is : I cannot put /classes/weblogic in classpath because  
weblogic uses -Dweblogic.classpath variable for it's classpath
and if I try to put it in -classpath weblogic just don't start

How can I setup Cactus to use classpath from -Dweblogic.classpath instead of standard classpath?