Not Recording SYSTEM4 Bytes Sent/Recv'd

When I logon to my company LAN, it downloads files from shared drives.

If I run DiamondCS Port Explorer v2.1 it shows the following, but no bytes Sent/Recv'd:
* SYSTEM 4 TCP localhost 139 localhost 0 LISTENING --- ---
* SYSTEM 4 TCP localhost 445 localhost 0 LISTENING --- ---
* SYSTEM 4 UDP localhost 137 *.*.*.* * LISTENING --- ---
* SYSTEM 4 UDP localhost 138 *.*.*.* * LISTENING --- ---
* SYSTEM 4 UDP localhost 445 *.*.*.* * LISTENING --- ---

However If I run WinInternals TcpViewPRO, I can see the following Sent and Recv'd:
SYSTEM 4 UDP myaddress:137 *.* 1681/84554
SYSTEM 4 UDP myaddress:138 *.* 187/40896 1/184

Any idea why Port Explorer doesn't pick this up?