Ubuntu – Why can’t I access internet through static IP set-up Ubuntu Server 14.04

Just installed Ubuntu Server 14.04 and set-up a static IP scheme for the machine. However when I try to ping google.com I get destination host unreachable. I can ping the machine IP just fine, the gateway also reports destination host unreachable. The machine is connected to a switch and we have a set range of IPs from the ISP. I previously set-up a Windows 7 machine to static IP scheme and have used the same DNS and Gateway. On the Windows machine I am able to connect to the internet just fine. Network set-up (found in /etc/network/interfaces) is as follows:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
  address 128.159.180.xxx
  netmask 255.255.255.0
  network 128.159.180.0
  broadcast 128.159.180.255
  gateway 128.159.180.254
  dns-nameservers 208.69.150.252

A few things to note: This is Ubuntu Server 14.04 so it is CLI only no desktop GUI and I have check to make sure that DHCP is not running and have uninstalled the DHCP client from the machine. Please help discover why I have no internet connection.

EDIT: for ifconfig eth0

eth0    Link encap:Ethernet HWaddr: 00:25:90:d0:ad:5a
        inet addr: 128.159.180.xxx Bcast: 128.159.180.255 Mask: 255.255.255.0
        UP BROADCAST MULTICAST MTU:1500 Metric:1
        RX packets:0 errors:0 dropped:0 overruns:0 frame:0
        TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
        collisions:0 txqueuelen:1000
        RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
        Memory:fb820000-fb840000

for ip route list:

default via 128.159.180.254 dev eth0
128.159.180.0/24 dev eth0 proto kernel scope link src 128.159.180.xxx