Ok, baby steps. Remove the dust cover and bolt (or nut) clean the threads and look in there making sure there is nothing in there that shouldn't be. remove the spindle from the puller and insert it, then look to make sure it is resting on the axle with some clearance to the crank. If it does, reassemble the puller with only a few threads so that the tool is way backed off. Screw the puller into the crank until it bottoms out. Now turn the puller until it meets the axle. Continue to tighten until crank begins to move.