Ok I see the problem now, the axle skewer ends up -a 2 millimeter thickness of a Burley mount- shy of being threaded in all the way. So your best solution is to take the kickstand plate, assuming you don't use the kickstand, and grind down the extra width of the ridge where the kickstand bolt holes are, until it is flush with the rest of the plate body and drill a new hole (measure to make sure you have enough room) for fastening the Burley mount. Here's a rough illustration.