Installing JDK on Vista 64-bit

I needed to work on some Java SE application and all the machines I have now run Vista 64-bit, I downloaded the JDK 6 update 6 for Windows x64 from the Sun website but it doesn't seem to work at all, the setup went okay but then, Eclipse craches just after showing the splash screen and the NetBeans installer says that it can't find the jdk on my computer, I installed the 32-bit jdk and everything worked fine.

update: I gave it another look and I found that the Eclipse I got was 32-bit and I read on the web that the NetBeans setup has issues and some say that you can ignore the installer, extract the zip and run, so maybe there was nothing wrong with neither the JKD nor Vista, it was just different configurations that didn't match.