Nikon cpature nx: can't load file?

I have experienced that those pictures I took with my Nikon D300 can't load onto Nikon capture nx.
How can I do to fix it?

The easiest and best method to transfer photos and video from your camera to your computer is via a little USB card reader (which are very cheap these days and widely available).

Plug the reader into a USB port and insert the memory card.
It will show up as a drive, and you can simply drag and drop the photos across to the folder of your choice.
http://www.ephotozine.com/article/Card-Readers-explained-140