Accounting Document for 101E & 601E movement type

Hi guys,

When i do a GR with 101 E movement type only material document is getting created,no accounting document is getting generated,what could be the possible reasons & <b>what setting need to be done to solve the above mentioned problem?</b>

Similalry when i do GI for sale order using 601 E movement type no accounting document is getting generated

Pls advice me