Two part question. First, I just recently installed photoshop CS4 to my (windows vista) computer and I go to upload NEF photos to bridge and I check the box that says "Convert to DNG" and when it finishs uploading it says "Files successfully copied, However, DNG conversion failed." It says it everytime and I don't know what to do about that.
Second part: I try to open my NEF files in photoshop it says "Could not complete your request because it is not the right type of document." I am using a Nikon D90 and I don't know if that has anything to do with this. I apologize if this question is in the wrong forum, I am new to this and I thought maybe camera raw had something to do with this at least.
You need to update your Camera Raw plug-in to either version 5.2 or 5.3RC, as well as the new DNG converter. They are available on the Adobe download page, and there are complete instructions for installation available there.