Bulk file transfers stops randomally

When trying to transfer some large sub-tree from FTP server, transfer stops suddenly after session of few minutes without any error.
The FTP is located in the same LAN and timeouts are not the problem. It looks like the job is not being processes correctly.

This happens usually with *NIX (SUN) station acting as FTP server.
Other FTP Clients are processing correctly.

Use the global queue for your transfers.