How do I set up a sitecom wireless range extender?

SOURCE: Belkin Universal Wireless Extender Set-Up Problems

Have you tried restarting and resetting the router as well ?

SOURCE: Cannot connect Belkin F5D8233-4 Router to Mac Laptop

Hi, I had the same problem with my MBP and the best solution I found was:
Dissable the Wlan security and use Mac Address control only for the wireless. This will keep your network secure anyway and you can connect normally.

The only inconvenience is that when you want to connect other computers to your wireless you have to enter its MAC address on the list.

Remember to set the list as Allow.

SOURCE: Belkin n wireless router dropouts on mac and pc

Check for a firmware update and, if that doesn't work, call Belkin and discuss a possible warranty replacement.

I have had nothing but problems with their equipment and do not recommend it.

SOURCE: Trying to create a bridge with two routers

You do not need a bridge if you are using a wireless adaptor on your pc in the other room. Just set up the Belkin Plus router to the WEP security settings you want and make sure the pc wireless usb adaptor has the same settings as the router. You should be good to go. Good Luck.

SOURCE: can't log on 192.168.0.234 i have belkin router

First reset your router to factory defaults.
You can reset it with RESET button press it for 10 secondsd it is in back side of router.
Then connect your router to comuter with ethernet cable then you can access it with following link.
http://192.168.1.1
or
http://192.168.0.1
for belkin router
http://192.168.15.1

user name as "admin" and if it want password then "admin" or blank or "password"

Then you can access it's configuration.
Let me know if you need more assistanse.
Thanks.