[galaxy-dev] Upload via URL returns empty output

Hi all, I have created a Data library and uploaded (linked) some fastq files. After applying the bar code splitter tool, when I click on the output links I can get the output on my browser. I also get them by copy pasting the address in a new tab. But when I try the upload via URL by copy pasting the address I get an empty output. I haven't setup an ftp server neither I'm using and apache proxy. Could this be the problem? Bests, Nikos