•	Make sure the original item is located in a share point or in the appropriate Web folder. If it's not, share the item that contains the original item and alias, or move the original and the alias to a shared area.
•	Make sure the correct access privileges are set for the original item.
•	Try stopping and starting the Web server. If that doesn't work, recreate the aliases in the Finder directly on the server (not while logged on to the server).

Related topic

Solving problems with Web services