What kind of router, and what firmware version do you have? Also, how is your soundbridge and NSLU2 connected? Wired? Or wireless?
The router is:
Zyxel Prestige 660HW-67
ZyNOS Firmware-Version: V3.40(SQ.0) | 09/09/2004
DSL Firmware-Version:TI AR7 01.01.08.00
Standard:ADSL_G.dmt
Soundbridge is connect wireless.
NSLU2 is connected via cable with the router.