What device are you testing on? Does it have some QoS software running (Dell's Smartbyyte for example?)
Boot a computer/laptop into safe+networking mode and try again on a new ethernet cable ) they do sometimes fail.
--------------------
John
--------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router +2 Airport Express's. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.