"The orbit insertion maneuver was confirmed to have started on time. But after the expected blackout due to occultation by Venus, the communication with the probe did not recover as planned. The probe was found to be in safe-hold mode, spin-stabilized state with 10 minutes per rotation."
Due to the low data rate in this mode (low gain, I assume unaimed antenna) it'll take a while to figure out what happened.
http://translate.google.com/translate?hl=en&sl=ja&tl...