Harrison Alpha 330 lathe Fanuc 21it SRAM back up problems

[Sucram]

I have a Harrison Alpha 330s plus lathe with Fanuc controller and have been trying to do a sram back up as per the FANUC instructions. It all goes ok until it asks me to back up sram data.... it asks gor "Yes or no", when I hit the soft key yes nothing happens! I have tried different cards but with no luck. All these cards do however work with the machine when reading and copying program files to the machines memory. Also is the machine will not complete a format of any of these cards, it will continually just flash "formatting" and not complete! I was however able to format them successfully fat on my laptop. I'm a bit stuck now as I'd like to back the machine up but it's just not working! Any suggestions appreciated.