CWDM Between Powerconnect 6200's

Hi,

I'm trying to get CWDM working between two sites in London on Dell Powerconnect 6224 and a 6248. I've got the 2x 10GB SFP+ modules in the back of both and some tuned SFP+ CWDM optics which are coded for dell.

I get a link on both sides however can't get any proper connectivity working. Another post  has suggested that they have had CWDM working with these switches before.

I've put the transceiver diagnostic information below:

Site1:
Temperature         54.1  (oC)
Voltage         3.293  (V)
Current         23.3  (mA)
Ouput Power         -2.470  (dBm)
Input Power         -10.685  (dBm)
Transmitter Fault         No
Loss of Signal         No

Site2:
Temperature         50.1  (oC)
Voltage         3.239  (V)
Current         29.9  (mA)
Ouput Power         -0.496  (dBm)
Input Power         -13.747  (dBm)
Transmitter Fault         No
Loss of Signal         No

On both sites we are seeing transmit data but no received:

Site1:
Receive Statistics  Total Bytes(Octets)         0
Unicast Packets         0
Multicast Packets         0
Broadcast Packets         0
Packets with Errors         0
Packets Discarded         0

Transmit Statistics  Total Bytes(Octets)         390208219
Unicast Packets         50889
Multicast Packets         140321
Broadcast Packets         1106698
Packets Discarded         3

Site2:
Receive Statistics  Total Bytes(Octets)         0
Unicast Packets         0
Multicast Packets         0
Broadcast Packets         0
Packets with Errors         0
Packets Discarded         0

Transmit Statistics  Total Bytes(Octets)         2346760
Unicast Packets         0
Multicast Packets         24674
Broadcast Packets         0
Packets Discarded         0


Any suggestions, should CWDM SFP+ optics work in these switches?

Thanks,
Peter