We can't tell you want to do without knowing which article is involved - and since we don't know the article title, we can't even look at it to find out why the D/L might be missing.
YOu need to contact the admins and tell them the article URL - they can then look to see what is going on, and whether the D/L is recoverable.
Best place to ask is probably here:
Article Writing Discussion Boards[
^] and include the text "Sean-Ewington" after an "@" to let him know you need help.