Slight correction.. older windows versions can't handle such long paths, Winmx has the same limitation (i think because it was coded to be compatible with win 9x)
generally the solution is to make a folder with a short name in the root of your drive to download & another to share from, this is detailed in the tutorial for sharing on 3.53/3.31, by reducing the length of the path, files with long names generally cease to pose a problem.