Snap, same problem here.
I receive a log-in prompt each time I try to open an Ebay (or Auctivia) page containing ANY of my image that Auctivia host for me. Even tried filling in the prompt with my user name and password but it will not accept either.
The problem occurs in both Internet Explorer and Firefox, so no help there!!
I've just checked item 150082357143 for the OP and I can see it and my Hubby has logged on to his computer and can see all my images too, so it appears that each Auctivia user is being asked for their own login to view their own images!!!!
I've logged it as support request, so I'll wait and see what happens next......
Crazy morning
Cath