I seem to have fixed the problem by following the instrauctions on thread
It may be that I have placed the wrong url in the HTTP address on the local info tab in the first place.
I corrected (changed) this entry
Followed your instructions:
The HTTP address on the local info tab is for the Remote address.
the URL Prefix on the Testing Server tab is for the local testing server address.
but I noticed that after carrying out changes on the local info tab no file seemed to to have been updated when carrying out an upload.
I wonder is this normal, seems like you get an initial entry and then cannot modify via DW?