Cannot write code in arduino-0017 IDE

Hi, guys

I cannot type anything in the arduino-0017 IDE. When I open an example, I can compile and upload it, but I just cannot type in any code in the IDE.
I am using windows vista home premium and I have update my java platform to the latest edition. I have tried to run the IDE in compatibility mode, disable the areo color scheme or activate the administration option, but none of these works.
Can someone offer a suggestion? Thanks for any help.

Best,
Oliver