Ok,
So I got a Prusa i3 with a Melzi board and it does nothing excpt turn on a red light when you power it.
My Win7(x64) does not recognize the drivers as working for the device and when forced to use them "This device cannot start. (Code 10)".
I do not have an SDcard in the board but do not know if it is needed and if there are any restrictions on size. as I only have an 8GB(currently in my phone).
Andrew.