I'd similar problem while run the uplink in WinXP. Runnig Uplink in Win2k is okay. But I still can't use it because after the incoming call sent to my SIP client, the skype will drop the line by reason "sound device problem". In fact I can hear the first few word before the line was dropped. So the problem was my Skype (2.0x & 2.5) do not like device "uplink" as its sound device.