The obstacles on the lunar surface may be standing in the way for the lander from receiving the signals, Chandrayaan-1 Director Mylswamy Annadurai told ANI on Sunday.

"As we have located the lander on the lunar surface, we now have to establish contact with it. The place, where the lander alighted is expected to be not conducive enough for the lander to soft-land. There may be some obstacles, which could have been stopping us from establishing the connection," Annadurai was quoted by ANI as saying.