@blaser: Don't try to be 'cute' with an update package unless you know what you're doing. (And, no, it's not packaged to work as an lp package, so, yeah, it doesn't work, nothing strange there...).
Read the first post & usbnet's doc again. (And, FWIW, when you mention an 'error', it actually helps if you actually give us a bit more details about it ^^).
Wild guess: you were rebooting instead of using the UYK link.
@Tanga: IIRC, that was just a wild guess. Can't really diagnose this kind of issue by remote mind read
. Do a bit of digging, check the logs, try to pinpoint what/when happens, etc.