Because it shut not up the doors of my mother's womb; literally, of my womb; i.e. "of the womb which bare me." By a stretch of imagination, the night is supposed to have power to open or shut wombs, and is blamed for not having shut up the womb in which Job was conceived.
Nor hid sorrow from mine eyes; i.e. "and did not so prevent all the sorrows that have befallen me."