Connecting ASA to Nexus 7000 via fiber

I am trying to connect the ASA (TenGig ports) to the Nexus 7000, but am receiving a Transceiver validation failed error.  I know I can remove this error by issuing the command switchport mode fex-fabric, but isn't that just for configuring connections to FEX? Even if I do issue that command the link does not come up.  I have also tried hard coding the speed to 10000 and 1000 with the same result for each.  the SFPs are cisco products and not 3rd party.  Any ideas?

Here are the configs for the Nexus:

version 6.1(2)

interface Ethernet3/17
  switchport mode trunk
  switchport trunk allowed vlan 10-20
  channel-group 2
  no shutdown

interface Ethernet3/18
   switchport mode trunk
  switchport trunk allowed vlan 10-20
  channel-group 2
  no shutdown

interface port-channel2
  switchport mode trunk
  switchport trunk allowed vlan 10-20

Config for ASA

interface TenGigabitEthernet0/6

channel-group 2 mode active

interface TenGigabitEthernet0/7

channel-group 2 mode active

interface Port-channel2

interface Port-channel2.10

vlan 10

interface Port-channel2.11

vlan11

context inside

  allocate-interface Port-channel2.10

  allocate-interface Port-channel2.11

  config-url disk0:/inside.cfg