transfer large files via ethernet hangs on lenovo m57

[Jvan Ferrari]

When I try to copy folders containing many files (such as MP3) from my home server (ubuntu server 13:04) to my PC ThinkCentre M57 (6395-AV7) with ubuntu 13:04 the transfer stops after a few mega transferred and you have to restart Nautilus ... .
With Ubuntu 12.04 does not happen ..........
 with both operating systems, however,
transfers to fruition, however, are slow both incoming and outgoing (max 35 MB / S) .....
Instead, the file transfer to the server from other operating systems (win and mac) is fast (80 MB / S approximately, depending on the file type)