same issue as you, from what I have read so far:
1 - switch on back to off
2 - connect power
3 - hold yellow button while power switch to 'on' for 5 seconds.
the defaults should be admin / password (i've also seen ADMIN / PASSWORD)
I can report that I have not had any luck with this so far. Perhaps the camera sets a static IP address and not auto-dhcp.
Product website: goscam . com/en/en_product_view.php?Id=40
Good luck. My earlier experience with a working gp280 - this camera sucks, the IE applet activeX viewer is unstable, works (!) only on IE
and... no support.