Russian space officials on Wednesday delayed for two days the launch of a space craft to carry a replacement crew to the international space station, citing problems with the vessel's docking system. The Soyuz space craft was scheduled to blast off from Russia's Baikonur cosmodrome on Oct. 9 with Russian cosmonaut Salizhan Sharipov and U.S. astronaut Leroy Chiao. They are to replace cosmonaut Gennady Padalka and astronaut Mike Fincke, who are winding down a six-month mission on the orbiting station. On Wednesday, a spokesman for the Russian space agency said problems with the Soyuz's docking system had forced officials to reschedule the launch for Oct. 11.