Intel X520-DA2 10 gig NIC doesn't show up after vib install

I've been beating my head against the wall trying to figure out what i'm doing wrong on my ESXi 6.0 host. Here is my hardware

Server: HP DL360 G6

NIC: Intel X520-DA2

I followed the KB instructions and installed the driver:

esxcli software vib install -d  /var/log/vmware/ixgbe-3.15.1.8-offline_bundle-1240857.zip

I rebooted the server and verified the VIB is in the list

[root@localhost:~] esxcli software vib list

Name                           Version                              Vendor  Acceptance Level  Install Date

-----------------------------  -----------------------------------  ------  ----------------  ------------

net-ixgbe                      3.15.1.8-1OEM.550.0.0.1198611        Intel   VMwareCertified   2015-07-02

I can see the NIC in the hardware PCI list

0000:04:00.1

   Address: 0000:04:00.1

   Segment: 0x0000

   Bus: 0x04

   Slot: 0x00

   Function: 0x1

   VMkernel Name: vmnic3

   Vendor Name: Intel Corporation

   Device Name: 82599EB 10-Gigabit SFI/SFP+ Network Connection

   Configured Owner: Unknown

   Current Owner: VMkernel

   Vendor ID: 0x8086

   Device ID: 0x10fb

   SubVendor ID: 0x8086

   SubDevice ID: 0x7a11

   Device Class: 0x0200

   Device Class Name: Ethernet controller

   Programming Interface: 0x00

   Revision ID: 0x01

   Interrupt Line: 0x0b

   IRQ: 11

   Interrupt Vector: 0x30

   PCI Pin: 0x01

   Spawned Bus: 0x00

   Flags: 0x0201

   Module ID: 4110

   Module Name: vmklinux_9

   Chassis: 0

   Physical Slot: 1

   Slot Description: PCI-E Slot 1

   Passthru Capable: true

   Parent Device: PCI 0:0:9:0

   Dependent Device: PCI 0:4:0:1

   Reset Method: Function reset

   FPT Sharable: true

But the NIC doesn't show up in the NIC List under esxcli network or in VSphere (just the motherboard integrated NICs show up)...what am I doing wrong???

[root@localhost:~] esxcli network nic list

Name    PCI Device    Driver  Admin Status  Link Status  Speed  Duplex  MAC Address         MTU  Description

------  ------------  ------  ------------  -----------  -----  ------  -----------------  ----  ----------------------------------------------------------------------------------

vmnic0  0000:02:00.0  bnx2    Up            Up            1000  Full    1c:c1:de:6c:e2:a0  1500  QLogic Corporation NC382i Integrated Multi Port PCI Express Gigabit Server Adapter

vmnic1  0000:02:00.1  bnx2    Up            Down             0  Half    1c:c1:de:6c:e2:a2  1500  QLogic Corporation NC382i Integrated Multi Port PCI Express Gigabit Server Adapter