SpaceX's first manned launch with its Dragon capsule isn't going to take place until 2018. The company had planned to carry out a manned mission for NASA next year, but it says further evaluation of its Falcon 9 fueling system is necessary. It'll use the extra time to review and adjust its "designs, systems and processes."
The additional evaluation time follows a Falcon 9 explosion that occurred in September 2016. NASA was a little more concerned about the manned launch after that incident.
An unmanned test launch of the Dragon capsule is scheduled for November 2017.