Perhaps you could give us a bit more of a clue.
Where is the link?
Do you get an error message?
If you get an error message what is it?
If you do not get an error message, what exactly happens?
Can you right click on the link and select "Copy Link Address" (or something like that) and paste it here.
EDIT:
Did you mean the "ebay Items" section of the forums?
Just tested it, and it works for me. Odd.