404 Error when viewing Wiki or Profile Manager in a browser

I have been struggling with Lion Server for a numbers of months now and am very frustrated with the difficulty of diagnosing what seem to be very simple issues. In particular I have Profile Manager and Wiki Server both behaving properly when configuring, starting and stopping them in Server Admin. They look as if all is OK. However when I try to go to the Wiki or Profile Manager in a browser I just get a 404 error.

I have searched and searched for a solution but have been totally unsuccessful. If anyone can help me I would most possibly become a friend on their Facebook page!

Cheers

Martin Fuggle