Hi,
we bought them as a package from a supplier with the modules checked with hp and they are definatelly the correct ones, the fibre cable is also brand new and i have checked for any dust etc and all seems fine, the only thing I have not done is upgrade the firmware on the switches, it seems to work after a while but then goes off I have checked the logs on the switches and nothing is mentioned, the modules do have hp wrote on them and were security sealed
thanks very much