Installing zendstudio fails

[Kjell Midtseter]

List members!
I started out with a clean install from a 5.3R CD. Then I cvsup'ed and built a new 
GENERIC kernel and new ports followed by installing PHP5/Apache13
After fetching the latest linux glib2.1 server/client zendstudio package  from the 
zend.com site, I went through the make, make install sequence and ended up with the 
following:
==================================
sexy# make install
===>  Installing for ZendStudio-3.5.2
===>   ZendStudio-3.5.2 depends on file: /compat/linux/etc/redhat-release - found
===>   Generating temporary packing list
===>  Checking if devel/zendstudio already installed
/usr/ports/devel/zendstudio/work/ZendStudio-3_5_2/ZendStudio-3_5_2.bin
Preparing to install...
Extracting the JRE from the installer archive...
Unpacking the JRE...
Extracting the installation resources from the installer archive...
Configuring the installer for this system's environment...

Launching installer...

Invocation of this Java Application has caused an InvocationTargetException. This 
application will now exit. (LAX)

Stack Trace:
java.lang.NoClassDefFoundError
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(Unknown 
Source)
        at java.awt.Window.init(Unknown Source)
        at java.awt.Window.<init>(Unknown Source)
        at java.awt.Frame.<init>(Unknown Source)
        at java.awt.Frame.<init>(Unknown Source)
        at com.zerog.ia.installer.LifeCycleManager.f(DashoA8113)
        at com.zerog.ia.installer.LifeCycleManager.g(DashoA8113)
        at com.zerog.ia.installer.LifeCycleManager.a(DashoA8113)
        at com.zerog.ia.installer.Main.main(DashoA8113)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.zerog.lax.LAX.launch(DashoA8113)
        at com.zerog.lax.LAX.main(DashoA8113)
This Application has Unexpectedly Quit: Invocation of this Java Application has caused 
an InvocationTargetException. This application will now exit. (LAX)
*** Error code 255

Stop in /usr/ports/devel/zendstudio.
====================================
Any hints of what causes the "InvocationTargetException" are much appreciated!
Kjell