Automatic download for a Software (download button) not work, if there is a "%20" in the URL. Solutions, quotas for the URL and a space.
With Workaround:
„http://download.microsoft.com/download/E/A/E/EAE6F7FC-767A-4038-A954-49B8B05D04EB/ExpressAdv 64BIT/SQLEXPRADV_x64_ENU.exe"
Sorry, wrong screenshot