Attachments posted via API not accepting active=1

When posting attachment records via API, I am setting the active value to 1, but when I view the record in the API , the record shows active = 0. I have tried updating that same record to set active = 1, but it remains 0. All other fields of the attachment record seem to post and update correctly. As a result I am not able to view the attachment within the application because active=0. Anyone else have this problem or any ideas?