Java Card

Hello,
so far i have managed to write some Applets and install also Cap files on a Card.
But i am not able to install my own created cap files...

My Environment ist the following:
My OS is Windows Vista
I am using JavaCard 2.1.1 (Cause my Stick has only it)
I am using JCDE 0.1 for JavaCard 2.2.2
The Card is GloablPlatform compatible :-) (i think all javacards are,or??)
I am using GPShell to install Caps.
The applet is written in JCDK 2.1.1

I can install some Test Caps. (Caps i got form another Hompage like wrankl.de)
I am writing more or less the same code as the test Caps.

I am converting the Applet with JCDE and i am testing it with JCDWE. So far no problem at all.
But as soon as i want to Install the Cap i am getting the following error:
Response: 6438 unknown ISO Error. (0x80206438)
In the first place the installation looks fine but than it interrupts with this error...

If i want to convert the applet by hand i am getting only strange envrionment errors like jre1.6 was not found or something like this.
The problem is that it looks like the global variable is defined well but the error says otherwise.

So if anybody as an idea about:
- my global variable problem in windows vista
- what the error 6438 means or stand for
- if there exists a better eclipse plugin to wrap the jcdk tools
- if there exists another cap converter

I would be really grateful.
Thanks & Bye
McUrban