Grisseed Blade 40 Chip

[4amrobert]

Evening all,
I got myself a few of these 40 chip boards, using cpu-miner: cpuminer-GC3355-win32-sandor111-tui
I have it working with 4 boards no problem .
I added an extra 2 boards and I have used com config \\.\com#:freq, and this has worked with the original 4 boards but not the new 2, the 2 i have added do work, they are recognised, the show the ID and the freq set but i get no hash at all!!
I am setup with a mobo

sny help on windows config will be great