email attachments

Hi all. Got a puzzle here. For the last nine months, I've been getting a monthly email from a company, with a pdf document attached. For the last two months, the emails come through ok, but have had no indication of any attachments at all. I have Win7 and Windows Live Mail, and there have been no changes to my pc, that I know of. Does anyone have any ideas on this? Puzzles me, because it used to work just fine. Thanks. Rick