Earlier start the machine twice postponed due to defects in the first and second stage of the rocket. Initially, the launch was scheduled for October 26, 2012, but failed because helium leak resulting from damage to the connection pad and the first stage. November 29 of that year, the launch was canceled 17 minutes before the start of a problem in the second stage.
The first launch of KSLV-I took in 2009. The first stage worked fine, but at the end of the flight is not fairing separated, leaving the satellite did not go into orbit and burned up in the atmosphere.
Restarting the South Korean missile was conducted in 2010, but the device exploded in the air over 136 seconds after launch. Initial report on the fault of the Russian side commission investigated the incident, not confirmed.
The first stage of the rocket made in Khrunichev Khrunichev. It is a modification of the first stage of the launch vehicle "Angara". The second stage KSLV-I and satellite STSAT-2C are made in South Korea.
The Source: Interfax, Lenta.ru