the inability of my usb connector to connect to my wii on a regular basis is what lead me to a LAN adapter purchase in the first place. I did not find it reliable at all but try moving your wii super close to the usb adapter that worked a little bit for me. If your in an apartment or something you could try and see if the wii can find any other connections, I found one in my last apartment building but it was locked.
my wii number is
8314 4155 7406 0563