WiFi doesn't work with LAN card in WINXP sp2

Hi!

I've got a LAN card with parameters in my local area network: ip 10.0.20.48
mask 255.255.255.0 gate 10.0.20.254

and it works perfect, but when I try to install USB WiFi adapter (it's a
Billionton device), everything crashes. The parameters I use for wireless
network are: ip 192.168.0.1 mask 255.255.255.0 gate 10.0.20.48

it works after first reboot together with LAN card, and I can share my
vpn-internet connection. But after second reboot my LAN card doesn't work at
all, and in device manager I see some problems with "TCP/IP protocol driver".

I use WinXP SP2, what should I do?