The launch with a Falcon 9 rocket had been scheduled for today from Florida. But the company said it has delayed it until Thursday because of unexpected readings in the fuel system.
It was to be the first launch with an improved version of the Falcon 9 after a test flight in California.
SpaceX is eager to get into the commercial satellite launch business, estimated to be worth 190 billion dollars a year, with competitive prices.
This time it was to launch a satellite for the Luxembourg company SES, the second largest in the world in that sector.
More From This Section
The SES satellite is to provide television, cable TV and other services to countries including China, Vietnam and India.
The Falcon 9 has already succeeded in sending its Dragon capsules to the International Space Station under a contract with NASA.
The capsule takes cargo into space and brings back material from scientific experiments.