Did you try the Belkin? I've used my Belkin on a few different computers and it has worked flawlessly with ARC250, various trunker programs and the like. Give it a shot, they're a bit pricey but they're worth it.
ya, this one works great, for everything BUT the scanner....i have a feeling its just ARC's crappy programming when it comes to I/O devices...every other piece of equipnment i have works perfectly with it