if that's a nikon D300, you need camera raw 4.3 or better. which camera raw is installed?
if you're unable to update camera raw via help>update, you can use a direct update: http://www.adobe.com/support/downloads/detail.jsp?ftpID=4680
for you printer, check for updated drivers: http://www.epson.com/cgi-bin/Store/support/SupportIndex.jsp