Localhost > "movie not loaded"

I guys, got a big issue here with flash.
I’m using bulkloader to load my items.

eg. it tries to load
http://localhost.localdomain/myproject/flash.swf?BulkLoaderNoCache=2_1_7509

, but does not find it.

I thought it was a bug from bulkloader, but then I try to access this file in firefox and when I right-click, I get “movie not loaded”.

Then I did upload all that on a remote sever.
And it works…

Fine, good news, but i’m actually working on that project and I really need to be able to work on my local computer.

I try to find an answer on internet but… no luck. Seems that others peoples have this problem but I didn’t find any solution.

I think I understood that this was a security issue and maybe related with the windows “hosts” file.

Here’s it’s content :

127.0.0.1       localhost
127.0.0.1        localhost.localdomain

Any idea ?
Would be a great help.
Thanks a lot !