From reading the manual, it seems that the spider valve amp will only work with the FBV when it has v1.18 or higher. This seems strange to me that a company would release a product that is incompatible with a vital accessory without it being updated. I do not know how old my amp is, as I bought it second hand, so it would appear that the previous owner never used a footswitch. I still need to know whether the amp will just allow me to update via midi without it being in a particular mode, obviously the amp doesn't see the FBV and the FBV doesn't see the amp (its display reads: FBV SB M11, when plugged to the Spider), so midi is my only option.