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The space shuttle Discovery sits atop launch Pad 39A at the Kennedy Space Center in Cape Canaveral, Florida August 25, 2009. NASA delayed a Tuesday morning liftoff of the space shuttle Discovery by a day because of stormy weather at the Florida launch site. REUTERS/Scott Audette (UNITED STATES TRANSPORT SCI TECH)

The space shuttle Discovery's launching was canceled on Tuesday night due to a trouble with a fuel valve, USA Today reports.

The cancelation occurred during fueling earlier Tuesday but NASA's managers and engineers were trying to find out what was the problem with the valve which worked fine during a countdown 24 hours earlier, the paper noted.

The Discovery and seven astronauts is a mission to deliver supplies and a new crewmember to the International Space Station.

NASA did not announce a new schedule for launching the Discovery but it must do it before August 30 in order not to conflict with other space missions launching from other countries.