R610 upgrade - Download failure

Hi all,

I'm trying to upgrade our 4 R610 poweredge models using repository manager. These are OS free right now, we will install windows server later.
According to some of the discussions i have seen, it is safer/easier to do that now as we don't have anything on the machine.

I'm doing everything as specified by the tutorial : add repository/entreprise server catalog/manual.windows r32...etc. Then i switch to export, SUU ISO and i start the download...well i try...
Each time, the job doesn't even start and it just say "failure"...like it wasn't able to reach the files on the FTP. With the linux version, download goes well. Any ideas?

Thanks