It seemed that after I installed the ASL kernel I could no longer access the server.
I rebooted and watched the console output and on googling the result it suggested a kernel error.
I rebooted with a standard kernel and all was fine.
Tried again with the ASL Kernel , same problem.
I raised a ticket and this is the response from Mike Shinn
So if anyone is considering a machine with an Intel Atom C2750, you may want to rethink that.Your network didnt start with the newer kernel. It appears to be a driver problem with the newer kernel and the hardware, a bug report has been opened with the kernel development team to investigate this further.