Hey `Gooz, ik denk dat ik exact hetzelfde problem gehad heb en het uiteindelijk heb kunnen oplossen. Bij mij ging het over een fout in de standaardconfiguratie. Je weet het ondertussen wss wel al, maar Net Direct krijg je tussen nu en februari thuis als je Netbanking al hebt

. Here goes... ('s in het engels omdat'k dit ooit eens op een site gezet heb)
Description
If you haven't received your Direct Net packet yet and you're forced to use Net Banking in Ubuntu, this might interest you. I don't know if this problem can be reproduced, but after installation of the Java Runtime the software simply wouldn't start. An 'init failed' error message was all that appeared in the lower-left corner of my screen.
Details
Installing Java is an easy job: follow the instructions in the Unofficial Starter Guide. When this is done, proceed to Net Banking and let the software install. Close and restart your browser as demanded and visit Net Banking again. If you are unlucky, you should now see an 'init failed' message in your status bar. Confirm that you have the same problem by right-clicking the applet that didn't load, and choosing 'open console'. About halfway through the log, it should say 'ClassNotFoundException: dexia.gewb.localHttpGui.HttpApplet'.
I know of 2 possible solutions to this problem, neither of which require much work.
Solution 1
In Gnome, go to the System menu and choose Preferences -> Sun Java 5.0 Plugin Control Panel. Click the 'Java' pane and the 'View...' button in 'Java Applet Runtime Settings'. In the window that opens you should see one line with empty Java Runtime Parameters. Add as parameters the following:
-cp /home/yourusername/java/classes
and click OK. Don't forget to substitute your username, it's what you use to login in Ubuntu . Restart your browser and try again. If this doesn't work, go to solution 2.
Solution 2
Be advised, this solution should only be used for computers with only one Net Banking user, although it shouldn't be hard to change this. When listing the applet's properties, I noticed 1) the path I set in the Applet Runtime Settings wasn't included and 2) the used 'classes' path didn't even exist. I chose to correct the second problem. Open a terminal and type
cd /usr/lib/jvm/java-1.5.0-sun/jre
Now verify that the directory 'classes' doesn't exist by typing
ls classes
An error message should appear. If and only if this is the case, create a symlink to the path we specified before (don't forget to substitute your username) by entering
sudo ln -s /home/yourusername/java/classes classes
You'll have to enter the sudo password because this directory isn't writable to normal users. If all went well, you should now be able to use Net Banking .