samba - Jul 2015 - Problem downloading files larger than 6MB using OpenVPN and Samba 4.1.19

Good afternoon friends,

I'm using Centos 6.X + samba 4.1.19 + openvpn.

My client recently purchased a new Dell with Windows 8.1 and when he connects
the vpn files larger than 6MB he did not copy.

I am using the client openvpn2.1.3.

Tested with OSX, Windows 7, Linux all copy typically less windows 8.x and 10.

Someone would have any idea what I can do to solve this problem?

Regards,

Gabriel Franca